655872666278556 has 12 divisors (see below), whose sum is σ = 1530369554649992. Its totient is φ = 218624222092848.

The previous prime is 655872666278513. The next prime is 655872666278591.

655872666278556 is nontrivially palindromic in base 10.

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

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, 27328027761595 + ... + 27328027761618.

Almost surely, 2^{655872666278556} is an apocalyptic number.

It is an amenable number.

655872666278556 is an abundant number, since it is smaller than the sum of its proper divisors (874496888371436).

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

655872666278556 is a wasteful number, since it uses less digits than its factorization.

655872666278556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54656055523220 (or 54656055523218 counting only the distinct ones).

The product of its digits is 60963840000, while the sum is 84.

The spelling of 655872666278556 in words is "six hundred fifty-five trillion, eight hundred seventy-two billion, six hundred sixty-six million, two hundred seventy-eight thousand, five hundred fifty-six".