55655566166566 has 32 divisors (see below), whose sum is σ = 84322135296000. Its totient is φ = 27549429248640.

The previous prime is 55655566166503. The next prime is 55655566166587. The reversal of 55655566166566 is 66566166555655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143514846 + ... + 143902126.

It is an arithmetic number, because the mean of its divisors is an integer number (2635066728000).

Almost surely, 2^{55655566166566} is an apocalyptic number.

55655566166566 is a deficient number, since it is larger than the sum of its proper divisors (28666569129434).

55655566166566 is a wasteful number, since it uses less digits than its factorization.

55655566166566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388884.

The product of its digits is 4374000000, while the sum is 73.

The spelling of 55655566166566 in words is "fifty-five trillion, six hundred fifty-five billion, five hundred sixty-six million, one hundred sixty-six thousand, five hundred sixty-six".