966
+966 is the international calling code for Saudi Arabia.
- Even
- Composite
Where 966 fits
Why 966 is special
Saudi Arabia contains Mecca and Medina and administers the Hajj, one of the largest annual gatherings of people anywhere.
Factors & digit properties
- Divisors (16)
- 1, 2, 3, 6, 7, 14, 21, 23, 42, 46, 69, 138, 161, 322, 483, 966
- Prime factorisation
- 2 × 3 × 7 × 23
- Digit sum
- 21
- Digital root
- 3
Representations
- Decimal
- 966
- Scientific notation
- 9.660 × 10^2
Roman numerals
C M L X V I
CMLXVI uses the subtractive pair CM: a hundred before a thousand — a thousand minus a hundred.
Binary
1 1 1 1 0 0 0 1 1 0
1 × 512 + 1 × 256 + 1 × 128 + 1 × 64 + 0 × 32 + 0 × 16 + 0 × 8 + 1 × 4 + 1 × 2 + 0 × 1 = 966
Octal
1 7 0 6
1 × 512 + 7 × 64 + 0 × 8 + 6 × 1 = 966
Hexadecimal
3 c 6
3 × 256 + c × 16 + 6 × 1 = 966
Read as powers of two: 512 + 256 + 128 + 64 + 4 + 2 = 966.
In historical numeral systems
Egyptian
9 coils of rope, 6 hobbles, 6 strokes
9 × 100 + 6 × 10 + 6 × 1 = 966. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 6 vertical wedges (sixties place), 6 vertical wedges (units place)
16 × 60 + 6 = 966. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
sampi, then xi, then stigma, marked as a numeral
sampi-xi-stigma + keraia
sampi + xi + stigma written in descending order and added — the letters carry their values wherever they stand, so this is addition, not place value.
Hebrew numerals
tav, then tav, then qof, then samekh, then vav
tav-tav-qof-samekh-vav
tav (400) + tav (400) + qof (100) + samekh (60) + vav (6) = 966, written in descending order.
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
- Abundant number
- Harshad (Niven) number
Related numbers & connections
Saudi Arabia and Kuwait are Gulf neighbours. Saudi Arabia administers the Hajj, among the largest recurring assemblies of people anywhere.
View 965 →Bahrain is connected to Saudi Arabia by a 25 km causeway opened in 1986, and was the first Gulf state where oil was found.
View 973 →Geography
+966 reaches Saudi Arabia, which administers the annual Hajj — among the largest recurring assemblies of people in the world, managed as a logistics operation on a national scale.
DocumentedGeographyGeography: Saudi Arabia
Common questions
Is 966 a prime number?
No, 966 is not prime.
What are the factors of 966?
The factors of 966 are 1, 2, 3, 6, 7, 14, 21, 23, 42, 46, 69, 138, 161, 322, 483, 966.
What is 966 in Roman numerals?
966 in Roman numerals is CMLXVI. CM is subtractive: a hundred before a thousand — a thousand minus a hundred. Written additively it would be DCCCCLXVI, which Roman inscriptions used freely — the strict subtractive form is a later convention.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026