725381668 has 24 divisors (see below), whose sum is σ = 1386352800. Its totient is φ = 329353920.

The previous prime is 725381651. The next prime is 725381681. The reversal of 725381668 is 866183527.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33283 + ... + 50581.

It is an arithmetic number, because the mean of its divisors is an integer number (57764700).

Almost surely, 2^725381668 is an apocalyptic number.

It is an amenable number.

725381668 is a deficient number, since it is larger than the sum of its proper divisors (660971132).

725381668 is a wasteful number, since it uses less digits than its factorization.

725381668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18267 (or 18265 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The square root of 725381668 is about 26932.9104999812. The cubic root of 725381668 is about 898.5085041177.

The spelling of 725381668 in words is "seven hundred twenty-five million, three hundred eighty-one thousand, six hundred sixty-eight".