56001661166 has 24 divisors (see below), whose sum is σ = 92676671640. Its totient is φ = 25360641680.

The previous prime is 56001661151. The next prime is 56001661187. The reversal of 56001661166 is 66116610065.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 365036 + ... + 495231.

It is an arithmetic number, because the mean of its divisors is an integer number (3861527985).

Almost surely, 2^56001661166 is an apocalyptic number.

56001661166 is a deficient number, since it is larger than the sum of its proper divisors (36675010474).

56001661166 is a wasteful number, since it uses less digits than its factorization.

56001661166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860560 (or 860549 counting only the distinct ones).

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

The spelling of 56001661166 in words is "fifty-six billion, one million, six hundred sixty-one thousand, one hundred sixty-six".