Number
266
266 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 3
- Digit sum
- 14
- Digital root
- 5
- Palindrome
- No
- Divisor count
- 8
- σ(n) — sum of divisors
- 480
Primality
Prime factorization: 2 × 7 × 19
Divisors & multiples
Aliquot sum (sum of proper divisors):
214
Representations
- In words
- two hundred sixty-six
- Ordinal
- 266th
- Roman numeral
- CCLXVI
- Binary
- 100001010
- Octal
- 412
- Hexadecimal
- 10A
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 266, here are decompositions:
- 3 + 263 = 266
- 37 + 229 = 266
- 43 + 223 = 266
- 67 + 199 = 266
- 73 + 193 = 266
- 103 + 163 = 266
- 109 + 157 = 266
- 127 + 139 = 266
Showing the first eight; more decompositions exist.
Unicode codepoint
Ċ
U+010A
Uppercase letter (Lu)
UTF-8 encoding: C4 8A (2 bytes).
Hex color
#00010A
RGB(0, 1, 10)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.10.