number.wiki
Number

67

67 is a prime, odd, a calendar year.

Cousin Prime Deficient Number Prime Sexy Prime Squarefree Year

Properties

Parity
Odd
Digit count
2
Digit sum
13
Digital root
4
Palindrome
No
Divisor count
2
σ(n) — sum of divisors
68

Primality

67 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)
1 · 67
Aliquot sum (sum of proper divisors): 1
Factor pairs (a × b = 67)
1 × 67
First multiples
67 · 134 · 201 · 268 · 335 · 402 · 469 · 536 · 603 · 670

Representations

In words
sixty-seven
Ordinal
67th
Roman numeral
LXVII
Binary
1000011
Octal
103
Hexadecimal
43

Also seen as

Prime neighborhood

Adjacent primes:

  • Previous prime: 61 (gap of 6)
  • Next prime: 71 (gap of 4)

Pair status: cousin with 71, sexy with 61.

ASCII character

As an ASCII codepoint, 67 is C. Printable ASCII character C.

Network port

TCP/UDP port 67 is the well-known port for DHCP server — Dynamic Host Configuration Protocol — server.

Hex color
#000043
RGB(0, 0, 67)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.67.