1066
1066 is the year of the Norman conquest of England and the Battle of Hastings.
- Even
- Composite
Where 1066 fits
Why 1066 is special
1066 is probably the single most recognised date in English history, and it carried three battles rather than one: Fulford and Stamford Bridge in September, then Hastings on 14 October, where Harold II was killed and William of Normandy took the throne. Its afterlife is cultural as much as historical — '1066 and All That' made the date shorthand for school history itself.
Same number, different meanings
How 1066 is understood across different contexts — never implying one meaning because of another.
- Mathematics
1066 is probably the single most recognised date in English history, and it carried three battles rather than one: Fulford and Stamford Bridge in September, then Hastings on 14 October, where Harold II was killed and William of Normandy took the throne. Its afterlife is cultural as much as historical — '1066 and All That' made the date shorthand for school history itself.
- History
In 1066, William of Normandy defeated Harold at Hastings and took the English throne, the last successful invasion of England (England).
- Culture
1066 functions in British culture as shorthand for school history itself, a role cemented by the 1930 comic book '1066 and All That', which parodied the way dates are memorised. Surveys of historical recall in Britain routinely find it the most widely known date, ahead of events far more recent.
1066 is part of
Factors & digit properties
- Divisors (8)
- 1, 2, 13, 26, 41, 82, 533, 1066
- Prime factorisation
- 2 × 13 × 41
- Digit sum
- 13
- Digital root
- 4
Representations
- Decimal
- 1066
- Scientific notation
- 1.066 × 10^3
Roman numerals
M L X V I
Binary
1 0 0 0 0 1 0 1 0 1 0
1 × 1,024 + 0 × 512 + 0 × 256 + 0 × 128 + 0 × 64 + 1 × 32 + 0 × 16 + 1 × 8 + 0 × 4 + 1 × 2 + 0 × 1 = 1,066
Octal
2 0 5 2
2 × 512 + 0 × 64 + 5 × 8 + 2 × 1 = 1,066
Hexadecimal
4 2 a
4 × 256 + 2 × 16 + a × 1 = 1,066
Read as powers of two: 1,024 + 32 + 8 + 2 = 1,066.
In historical numeral systems
Egyptian
1 lotus, 6 hobbles, 6 strokes
1 × 1,000 + 6 × 10 + 6 × 1 = 1,066. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 7 vertical wedges (sixties place), 4 corner wedges + 6 vertical wedges (units place)
17 × 60 + 46 = 1066. Places are separated by a space on the tablet, with the higher place written first.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Deficient number
- Harshad (Niven) number
Related numbers & connections
1066 is a year in the 11th century, in the 1060s.
History
In 1066, William of Normandy defeated Harold at Hastings and took the English throne, the last successful invasion of England (England).
DocumentedHistoryGeography: EnglandPeriod: 1066England was invaded twice in 1066. Harold II defeated a Norwegian army at Stamford Bridge on 25 September, days after a defeat at Fulford, then marched south and met William of Normandy at Hastings on 14 October, where he was killed. The compressed sequence — two invasions in three weeks — is a substantial part of why the outcome went as it did.
DocumentedHistoryGeography: EnglandPeriod: 1066
Culture
1066 functions in British culture as shorthand for school history itself, a role cemented by the 1930 comic book '1066 and All That', which parodied the way dates are memorised. Surveys of historical recall in Britain routinely find it the most widely known date, ahead of events far more recent.
DocumentedCultureCulture: BritishGeography: United KingdomPeriod: 1930 – present
Common questions
Is 1066 a prime number?
No, 1066 is not prime.
What are the factors of 1066?
The factors of 1066 are 1, 2, 13, 26, 41, 82, 533, 1066.
What is 1066 in Roman numerals?
1066 in Roman numerals is MLXVI.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 3 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026