656885025 has 48 divisors (see below), whose sum is σ = 1223344320. Its totient is φ = 345513600.

The previous prime is 656885023. The next prime is 656885041. The reversal of 656885025 is 520588656.

656885025 is a `hidden beast` number, since 6 + 568 + 85 + 0 + 2 + 5 = 666.

It is not a de Polignac number, because 656885025 - 2¹ = 656885023 is a prime.

It is a super-3 number, since 3×656885025³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (656885023) 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 47 ways as a sum of consecutive naturals, for example, 42610 + ... + 55940.

It is an arithmetic number, because the mean of its divisors is an integer number (25486340).

Almost surely, 2^656885025 is an apocalyptic number.

It is an amenable number.

656885025 is a deficient number, since it is larger than the sum of its proper divisors (566459295).

656885025 is a wasteful number, since it uses less digits than its factorization.

656885025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13423 (or 13412 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 45.

The square root of 656885025 is about 25629.7683368383. The cubic root of 656885025 is about 869.2868710263.

The spelling of 656885025 in words is "six hundred fifty-six million, eight hundred eighty-five thousand, twenty-five".