number.wiki
Number

6,689

6,689 is a prime, odd.

Deficient Number Prime Squarefree Twin Prime

Properties

Parity
Odd
Digit count
4
Digit sum
29
Digital root
2
Palindrome
No
Divisor count
2
σ(n) — sum of divisors
6,690

Primality

6,689 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)
1 · 6689
Aliquot sum (sum of proper divisors): 1
Factor pairs (a × b = 6,689)
1 × 6689
First multiples
6,689 · 13,378 · 20,067 · 26,756 · 33,445 · 40,134 · 46,823 · 53,512 · 60,201 · 66,890

Representations

In words
six thousand six hundred eighty-nine
Ordinal
6689th
Binary
1101000100001
Octal
15041
Hexadecimal
1A21

Also seen as

Prime neighborhood

Adjacent primes:

  • Previous prime: 6,679 (gap of 10)
  • Next prime: 6,691 (gap of 2)

Pair status: twin with 6691.

Unicode codepoint
U+1A21
Other letter (Lo)

UTF-8 encoding: E1 A8 A1 (3 bytes).

Hex color
#001A21
RGB(0, 26, 33)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.26.33.