566663 has 4 divisors (see below), whose sum is σ = 573120. Its totient is φ = 560208.

The previous prime is 566659. The next prime is 566677. The reversal of 566663 is 366665.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 566663 - 2² = 566659 is a prime.

It is a super-2 number, since 2×566663² = 642213911138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (566633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3095 + ... + 3272.

It is an arithmetic number, because the mean of its divisors is an integer number (143280).

2⁵⁶⁶⁶⁶³ is an apocalyptic number.

566663 is a deficient number, since it is larger than the sum of its proper divisors (6457).

566663 is an equidigital number, since it uses as much as digits as its factorization.

566663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6456.

The product of its digits is 19440, while the sum is 32.

The square root of 566663 is about 752.7702172642. The cubic root of 566663 is about 82.7513242031.

The spelling of 566663 in words is "five hundred sixty-six thousand, six hundred sixty-three".