655959972 has 12 divisors (see below), whose sum is σ = 1530573296. Its totient is φ = 218653320.

The previous prime is 655959947. The next prime is 655959991. The reversal of 655959972 is 279959556.

It is a tau number, because it is divible by the number of its divisors (12).

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, 27331654 + ... + 27331677.

Almost surely, 2^655959972 is an apocalyptic number.

It is an amenable number.

655959972 is an abundant number, since it is smaller than the sum of its proper divisors (874613324).

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

655959972 is a wasteful number, since it uses less digits than its factorization.

655959972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54663338 (or 54663336 counting only the distinct ones).

The product of its digits is 7654500, while the sum is 57.

The square root of 655959972 is about 25611.7155223933. The cubic root of 655959972 is about 868.8786239381.

The spelling of 655959972 in words is "six hundred fifty-five million, nine hundred fifty-nine thousand, nine hundred seventy-two".