566

566 is a natural number that follows 565 and precedes 567. It is even and composite, with prime factorization 2 times 283, where 283 is prime. Since both factors are primes and distinct, 566 is a semiprime and squarefree. It is also the 283rd even number in the sequence of positive even integers.

In Roman numerals, 566 is written as DLXVI.

In various numeral systems, 566 has these representations: binary 1000110110, octal 1066, hexadecimal 0x236, and base-3 202222. Its decimal digits sum to 17, giving a digital root of 8. The number is not divisible by 3 or 5.