657673656 has 16 divisors (see below), whose sum is σ = 1644184200. Its totient is φ = 219224544.

The previous prime is 657673651. The next prime is 657673663. The reversal of 657673656 is 656376756.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 657673599 and 657673608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657673651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13701511 + ... + 13701558.

Almost surely, 2^657673656 is an apocalyptic number.

It is an amenable number.

657673656 is an abundant number, since it is smaller than the sum of its proper divisors (986510544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

657673656 is a wasteful number, since it uses less digits than its factorization.

657673656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27403078 (or 27403074 counting only the distinct ones).

The product of its digits is 4762800, while the sum is 51.

The square root of 657673656 is about 25645.1487810073. The cubic root of 657673656 is about 869.6346094098.

The spelling of 657673656 in words is "six hundred fifty-seven million, six hundred seventy-three thousand, six hundred fifty-six".