6761
RFC 6761 defines special-use domain names.
- Odd
- Prime
Where 6761 fits
Why 6761 is special
It gives localhost a formal specification, which mattered once browsers began treating it as a secure origin.
6761 is part of
Factors & digit properties
- Divisors (2)
- 1, 6761
- Prime factorisation
- 6761
- Digit sum
- 20
- Digital root
- 2
Representations
- Decimal
- 6761
- Binary
- 1101001101001
- Octal
- 15151
- Hexadecimal
- 1a69
- Scientific notation
- 6.761 × 10^3
Other mathematical patterns
- Deficient number
- Sophie Germain prime
- Twin prime
Related numbers & connections
RFC 2606 reserved the example domains and RFC 6761 later gave them and localhost a formal specification.
View 2606 →Technology & computing
RFC 6761 establishes the special-use domain names registry and specifies handling for localhost, invalid, example and the reverse-mapping domains.
DocumentedTechnology & computingGeography: International — IETFPeriod: 2013
Common questions
Is 6761 a prime number?
Yes, 6761 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 6761?
The factors of 6761 are 1, 6761.
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