681
+681 is the international calling code for Wallis and Futuna.
- Odd
- Composite
Where 681 fits
Why 681 is special
Wallis and Futuna is a French collectivity in the Pacific that retains three traditional kingdoms alongside the French administration.
Factors & digit properties
- Divisors (4)
- 1, 3, 227, 681
- Prime factorisation
- 3 × 227
- Digit sum
- 15
- Digital root
- 6
Representations
- Decimal
- 681
- Binary
- 1010101001
- Octal
- 1251
- Hexadecimal
- 2a9
- Roman numeral
- DCLXXXI
- Scientific notation
- 6.810 × 10^2
Other mathematical patterns
- Deficient number
- Semiprime
Geography
+681 reaches Wallis and Futuna, where three customary monarchies operate alongside French republican administration.
DocumentedGeographyGeography: Wallis and Futuna
Common questions
Is 681 a prime number?
No, 681 is not prime.
What are the factors of 681?
The factors of 681 are 1, 3, 227, 681.
What is 681 in Roman numerals?
681 in Roman numerals is DCLXXXI.
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: 3 August 2026