625671665656 has 16 divisors (see below), whose sum is σ = 1173238552800. Its totient is φ = 312808051584.

The previous prime is 625671665639. The next prime is 625671665669. The reversal of 625671665656 is 656566176526.

It is a junction number, because it is equal to n+sod(n) for n = 625671665594 and 625671665603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3376785 + ... + 3557248.

It is an arithmetic number, because the mean of its divisors is an integer number (73327409550).

Almost surely, 2^625671665656 is an apocalyptic number.

It is an amenable number.

625671665656 is a deficient number, since it is larger than the sum of its proper divisors (547566887144).

625671665656 is a wasteful number, since it uses less digits than its factorization.

625671665656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6945318 (or 6945314 counting only the distinct ones).

The product of its digits is 81648000, while the sum is 61.

The spelling of 625671665656 in words is "six hundred twenty-five billion, six hundred seventy-one million, six hundred sixty-five thousand, six hundred fifty-six".