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
England 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.
- 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.
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
- Binary
- 10000101010
- Octal
- 2052
- Hexadecimal
- 42a
- Roman numeral
- MLXVI
- Scientific notation
- 1.066 × 10^3
Other mathematical patterns
- Deficient number
- Harshad (Niven) number
Related numbers & connections
Two dates that mark the beginning and the end of an era of invasion anxiety in Britain — the last successful conquest of England, and the defeat that ended the last serious threat of another. Both are taught as single battles despite each being the end of a longer campaign.
View 1815 →History
England 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: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 3 August 2026