56166566566166 has 24 divisors (see below), whose sum is σ = 101384407635120. Its totient is φ = 23241337888272.

The previous prime is 56166566566147. The next prime is 56166566566219. The reversal of 56166566566166 is 66166566566165.

56166566566166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 56166566566166.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9881518370 + ... + 9881524053.

It is an arithmetic number, because the mean of its divisors is an integer number (4224350318130).

Almost surely, 2^{56166566566166} is an apocalyptic number.

56166566566166 is a deficient number, since it is larger than the sum of its proper divisors (45217841068954).

56166566566166 is a wasteful number, since it uses less digits than its factorization.

56166566566166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19763042468 (or 19763042461 counting only the distinct ones).

The product of its digits is 1259712000, while the sum is 71.

Subtracting 56166566566166 from its reverse (66166566566165), we obtain a palindrome (9999999999999).

The spelling of 56166566566166 in words is "fifty-six trillion, one hundred sixty-six billion, five hundred sixty-six million, five hundred sixty-six thousand, one hundred sixty-six".