56666115156601 has 16 divisors (see below), whose sum is σ = 57557463955200. Its totient is φ = 55779374851200.

The previous prime is 56666115156577. The next prime is 56666115156641. The reversal of 56666115156601 is 10665151166665.

It is a cyclic number.

It is not a de Polignac number, because 56666115156601 - 2⁹ = 56666115156089 is a prime.

It is a super-2 number, since 2×56666115156601² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56666115156641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33588981 + ... + 35235661.

It is an arithmetic number, because the mean of its divisors is an integer number (3597341497200).

Almost surely, 2^{56666115156601} is an apocalyptic number.

It is an amenable number.

56666115156601 is a deficient number, since it is larger than the sum of its proper divisors (891348798599).

56666115156601 is a wasteful number, since it uses less digits than its factorization.

56666115156601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648080.

The product of its (nonzero) digits is 5832000, while the sum is 55.

The spelling of 56666115156601 in words is "fifty-six trillion, six hundred sixty-six billion, one hundred fifteen million, one hundred fifty-six thousand, six hundred one".