657625425 has 12 divisors (see below), whose sum is σ = 1087274160. Its totient is φ = 350733520.

The previous prime is 657625417. The next prime is 657625427. The reversal of 657625425 is 524526756.

It is not a de Polignac number, because 657625425 - 2³ = 657625417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (657625427) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4384095 + ... + 4384244.

It is an arithmetic number, because the mean of its divisors is an integer number (90606180).

Almost surely, 2^657625425 is an apocalyptic number.

It is an amenable number.

657625425 is a deficient number, since it is larger than the sum of its proper divisors (429648735).

657625425 is a wasteful number, since it uses less digits than its factorization.

657625425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8768352 (or 8768347 counting only the distinct ones).

The product of its digits is 504000, while the sum is 42.

The square root of 657625425 is about 25644.2084104774. The cubic root of 657625425 is about 869.6133504507.

The spelling of 657625425 in words is "six hundred fifty-seven million, six hundred twenty-five thousand, four hundred twenty-five".