6699
Port 6699 was Napster's default.
- Odd
- Composite
Where 6699 fits
Why 6699 is special
Napster ran from 1999 to 2001 and had a central index, which is precisely what made it possible to shut down. Every successor was designed to remove that single point of failure.
Factors & digit properties
- Divisors (16)
- 1, 3, 7, 11, 21, 29, 33, 77, 87, 203, 231, 319, 609, 957, 2233, 6699
- Prime factorisation
- 3 × 7 × 11 × 29
- Digit sum
- 30
- Digital root
- 3
Representations
- Decimal
- 6699
- Scientific notation
- 6.699 × 10^3
Roman numerals
Roman numerals as modelled here goes up to 3,999.
Binary
1 1 0 1 0 0 0 1 0 1 0 1 1
1 × 4,096 + 1 × 2,048 + 0 × 1,024 + 1 × 512 + 0 × 256 + 0 × 128 + 0 × 64 + 1 × 32 + 0 × 16 + 1 × 8 + 0 × 4 + 1 × 2 + 1 × 1 = 6,699
Octal
1 5 0 5 3
1 × 4,096 + 5 × 512 + 0 × 64 + 5 × 8 + 3 × 1 = 6,699
Hexadecimal
1 a 2 b
1 × 4,096 + a × 256 + 2 × 16 + b × 1 = 6,699
Read as powers of two: 4,096 + 2,048 + 512 + 32 + 8 + 2 + 1 = 6,699.
In historical numeral systems
Egyptian
6 lotuses, 6 coils of rope, 9 hobbles, 9 strokes
6 × 1,000 + 6 × 100 + 9 × 10 + 9 × 1 = 6,699. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
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
Related numbers & connections
BitTorrent and Napster represent opposite answers to distribution. Napster's central index made it stoppable; BitTorrent removed the component that made that possible.
View 6881 →Technology & computing
Napster's directory was centralised even though transfers were peer to peer, so a court order could stop it. Gnutella, Fasttrack and BitTorrent were each designed to remove the component that made that possible.
DocumentedTechnology & computingPeriod: 1999–2001
Common questions
Is 6699 a prime number?
No, 6699 is not prime.
What are the factors of 6699?
The factors of 6699 are 1, 3, 7, 11, 21, 29, 33, 77, 87, 203, 231, 319, 609, 957, 2233, 6699.
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