564725866 has 16 divisors (see below), whose sum is σ = 892785600. Its totient is φ = 267167808.

The previous prime is 564725851. The next prime is 564725879. The reversal of 564725866 is 668527465.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23026 + ... + 40738.

It is an arithmetic number, because the mean of its divisors is an integer number (55799100).

Almost surely, 2^564725866 is an apocalyptic number.

564725866 is a deficient number, since it is larger than the sum of its proper divisors (328059734).

564725866 is a wasteful number, since it uses less digits than its factorization.

564725866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18573.

The product of its digits is 2419200, while the sum is 49.

The square root of 564725866 is about 23763.9614963499. The cubic root of 564725866 is about 826.5692158437.

It can be divided in two parts, 5647 and 25866, that added together give a palindrome (31513).

The spelling of 564725866 in words is "five hundred sixty-four million, seven hundred twenty-five thousand, eight hundred sixty-six".