56866036666 has 16 divisors (see below), whose sum is σ = 86218795008. Its totient is φ = 28126930000.

The previous prime is 56866036663. The next prime is 56866036723. The reversal of 56866036666 is 66663066865.

It is a super-2 number, since 2×56866036666² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56866036666.

It is not an unprimeable number, because it can be changed into a prime (56866036663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110211 + ... + 354793.

It is an arithmetic number, because the mean of its divisors is an integer number (5388674688).

Almost surely, 2^56866036666 is an apocalyptic number.

56866036666 is a deficient number, since it is larger than the sum of its proper divisors (29352758342).

56866036666 is a wasteful number, since it uses less digits than its factorization.

56866036666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245837.

The product of its (nonzero) digits is 33592320, while the sum is 58.

The spelling of 56866036666 in words is "fifty-six billion, eight hundred sixty-six million, thirty-six thousand, six hundred sixty-six".