657065425 has 12 divisors (see below), whose sum is σ = 836782876. Its totient is φ = 511444800.

The previous prime is 657065399. The next prime is 657065443. The reversal of 657065425 is 524560756.

It can be written as a sum of positive squares in 6 ways, for example, as 19149376 + 637916049 = 4376^2 + 25257^2 .

It is not a de Polignac number, because 657065425 - 2⁵ = 657065393 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 354246 + ... + 356095.

Almost surely, 2^657065425 is an apocalyptic number.

It is an amenable number.

657065425 is a deficient number, since it is larger than the sum of its proper divisors (179717451).

657065425 is a wasteful number, since it uses less digits than its factorization.

657065425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710388 (or 710383 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 40.

The square root of 657065425 is about 25633.2874403577. The cubic root of 657065425 is about 869.3664410130.

The spelling of 657065425 in words is "six hundred fifty-seven million, sixty-five thousand, four hundred twenty-five".