566564817025 has 27 divisors (see below), whose sum is σ = 718030250371. Its totient is φ = 443469699440.

The previous prime is 566564817023. The next prime is 566564817067. The reversal of 566564817025 is 520718465665.

The square root of 566564817025 is 752705.

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

It can be written as a sum of positive squares in only one way, i.e., 203963334129 + 362601482896 = 451623^2 + 602164^2 .

It is not a de Polignac number, because 566564817025 - 2¹ = 566564817023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (566564817023) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 176884074 + ... + 176887276.

Almost surely, 2^566564817025 is an apocalyptic number.

566564817025 is the 752705-th square number.

566564817025 is the 376353-rd centered octagonal number.

It is an amenable number.

566564817025 is a deficient number, since it is larger than the sum of its proper divisors (151465433346).

566564817025 is an frugal number, since it uses more digits than its factorization.

566564817025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6510 (or 3255 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 55.

The spelling of 566564817025 in words is "five hundred sixty-six billion, five hundred sixty-four million, eight hundred seventeen thousand, twenty-five".