725666904945 has 16 divisors (see below), whose sum is σ = 1290074497920. Its totient is φ = 387022349232.

The previous prime is 725666904917. The next prime is 725666904979. The reversal of 725666904945 is 549409666527.

It is not a de Polignac number, because 725666904945 - 2⁸ = 725666904689 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2687655069 + ... + 2687655338.

It is an arithmetic number, because the mean of its divisors is an integer number (80629656120).

Almost surely, 2^725666904945 is an apocalyptic number.

It is an amenable number.

725666904945 is a deficient number, since it is larger than the sum of its proper divisors (564407592975).

725666904945 is a wasteful number, since it uses less digits than its factorization.

725666904945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5375310421 (or 5375310415 counting only the distinct ones).

The product of its (nonzero) digits is 97977600, while the sum is 63.

The spelling of 725666904945 in words is "seven hundred twenty-five billion, six hundred sixty-six million, nine hundred four thousand, nine hundred forty-five".