56111660066 has 32 divisors (see below), whose sum is σ = 105916833792. Its totient is φ = 21657364560.

The previous prime is 56111660053. The next prime is 56111660089. The reversal of 56111660066 is 66006611165.

It is a happy number.

It is a Curzon 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, 1686146 + ... + 1719101.

It is an arithmetic number, because the mean of its divisors is an integer number (3309901056).

Almost surely, 2^56111660066 is an apocalyptic number.

56111660066 is a deficient number, since it is larger than the sum of its proper divisors (49805173726).

56111660066 is a wasteful number, since it uses less digits than its factorization.

56111660066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3405374.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 56111660066 in words is "fifty-six billion, one hundred eleven million, six hundred sixty thousand, sixty-six".