566820864 has 153 divisors (see below), whose sum is σ = 1691995539. Its totient is φ = 182845440.

The previous prime is 566820853. The next prime is 566820869. The reversal of 566820864 is 468028665.

The square root of 566820864 is 23808.

It is a perfect power (a square), and thus also a powerful number.

566820864 is a `hidden beast` number, since 566 + 8 + 2 + 0 + 86 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (566820869) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 18284529 + ... + 18284559.

Almost surely, 2^566820864 is an apocalyptic number.

566820864 is the 23808-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 566820864

566820864 is an abundant number, since it is smaller than the sum of its proper divisors (1125174675).

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

566820864 is an frugal number, since it uses more digits than its factorization.

566820864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The cubic root of 566820864 is about 827.5900792462.

The spelling of 566820864 in words is "five hundred sixty-six million, eight hundred twenty thousand, eight hundred sixty-four".