566865 has 64 divisors (see below), whose sum is σ = 1209600. Its totient is φ = 248832.

The previous prime is 566857. The next prime is 566879. The reversal of 566865 is 568665.

566865 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 566865 - 2³ = 566857 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a Curzon number.

566865 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29826 + ... + 29844.

It is an arithmetic number, because the mean of its divisors is an integer number (18900).

2⁵⁶⁶⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

566865 is an abundant number, since it is smaller than the sum of its proper divisors (642735).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

566865 is a wasteful number, since it uses less digits than its factorization.

566865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63 (or 57 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 566865 is about 752.9043763985. The cubic root of 566865 is about 82.7611559029.

It can be divided in two parts, 566 and 865, that added together give a triangular number (1431 = T₅₃).

The spelling of 566865 in words is "five hundred sixty-six thousand, eight hundred sixty-five".