725164866 has 32 divisors (see below), whose sum is σ = 1612934400. Its totient is φ = 241503120.

The previous prime is 725164859. The next prime is 725164871. The reversal of 725164866 is 668461527.

725164866 is a `hidden beast` number, since 72 + 516 + 4 + 8 + 66 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61020 + ... + 71928.

It is an arithmetic number, because the mean of its divisors is an integer number (50404200).

Almost surely, 2^725164866 is an apocalyptic number.

725164866 is an abundant number, since it is smaller than the sum of its proper divisors (887769534).

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

725164866 is a wasteful number, since it uses less digits than its factorization.

725164866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12151 (or 12145 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 725164866 is about 26928.8853464082. The cubic root of 725164866 is about 898.4189798210.

The spelling of 725164866 in words is "seven hundred twenty-five million, one hundred sixty-four thousand, eight hundred sixty-six".