566864 has 20 divisors (see below), whose sum is σ = 1116000. Its totient is φ = 278880.

The previous prime is 566857. The next prime is 566879. The reversal of 566864 is 468665.

566864 = T₁₇₂ + T₁₇₃ + ... + T₂₀₃.

It is a congruent number.

It is an unprimeable number.

566864 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887 + ... + 1385.

It is an arithmetic number, because the mean of its divisors is an integer number (55800).

2⁵⁶⁶⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

566864 is a deficient number, since it is larger than the sum of its proper divisors (549136).

566864 is a wasteful number, since it uses less digits than its factorization.

566864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578 (or 572 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 566864 is about 752.9037123032. The cubic root of 566864 is about 82.7611072369.

The spelling of 566864 in words is "five hundred sixty-six thousand, eight hundred sixty-four".