656670225 has 12 divisors (see below), whose sum is σ = 1085694896. Its totient is φ = 350224080.

The previous prime is 656670221. The next prime is 656670257. The reversal of 656670225 is 522076656.

It is not a de Polignac number, because 656670225 - 2² = 656670221 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656670221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4377727 + ... + 4377876.

Almost surely, 2^656670225 is an apocalyptic number.

It is an amenable number.

656670225 is a deficient number, since it is larger than the sum of its proper divisors (429024671).

656670225 is a wasteful number, since it uses less digits than its factorization.

656670225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8755616 (or 8755611 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 656670225 is about 25625.5775544669. The cubic root of 656670225 is about 869.1921090466.

The spelling of 656670225 in words is "six hundred fifty-six million, six hundred seventy thousand, two hundred twenty-five".