556640625 has 44 divisors (see below), whose sum is σ = 976562480. Its totient is φ = 281250000.

The previous prime is 556640603. The next prime is 556640647. The reversal of 556640625 is 526046655.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (556640603) and next prime (556640647).

It is not a de Polignac number, because 556640625 - 2⁶ = 556640561 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 43 ways as a sum of consecutive naturals, for example, 29296866 + ... + 29296884.

Almost surely, 2^556640625 is an apocalyptic number.

It is an amenable number.

556640625 is a deficient number, since it is larger than the sum of its proper divisors (419921855).

556640625 is an frugal number, since it uses more digits than its factorization.

556640625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 39.

The square root of 556640625 is about 23593.2326102211. The cubic root of 556640625 is about 822.6055456552.

The spelling of 556640625 in words is "five hundred fifty-six million, six hundred forty thousand, six hundred twenty-five".