725398668 has 36 divisors (see below), whose sum is σ = 1834789320. Its totient is φ = 241648896.

The previous prime is 725398627. The next prime is 725398717. The reversal of 725398668 is 866893527.

It is a happy number.

725398668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62671 + ... + 73337.

It is an arithmetic number, because the mean of its divisors is an integer number (50966370).

Almost surely, 2^725398668 is an apocalyptic number.

It is an amenable number.

725398668 is an abundant number, since it is smaller than the sum of its proper divisors (1109390652).

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

725398668 is a wasteful number, since it uses less digits than its factorization.

725398668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12566 (or 12561 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 725398668 is about 26933.2260971463. The cubic root of 725398668 is about 898.5155231928.

The spelling of 725398668 in words is "seven hundred twenty-five million, three hundred ninety-eight thousand, six hundred sixty-eight".