655663366556 has 24 divisors (see below), whose sum is σ = 1253580941424. Its totient is φ = 297585953280.

The previous prime is 655663366531. The next prime is 655663366609.

655663366556 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×655663366556² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11041295 + ... + 11100518.

It is an arithmetic number, because the mean of its divisors is an integer number (52232539226).

Almost surely, 2^655663366556 is an apocalyptic number.

It is an amenable number.

655663366556 is a deficient number, since it is larger than the sum of its proper divisors (597917574868).

655663366556 is a wasteful number, since it uses less digits than its factorization.

655663366556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22142501 (or 22142499 counting only the distinct ones).

The product of its digits is 262440000, while the sum is 62.

The spelling of 655663366556 in words is "six hundred fifty-five billion, six hundred sixty-three million, three hundred sixty-six thousand, five hundred fifty-six".