56666666679 has 64 divisors (see below), whose sum is σ = 91755417600. Its totient is φ = 30386990592.

The previous prime is 56666666671. The next prime is 56666666747. The reversal of 56666666679 is 97666666665.

It is not a de Polignac number, because 56666666679 - 2³ = 56666666671 is a prime.

It is a super-2 number, since 2×56666666679² (a number of 22 digits) contains 22 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56666666671) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32887512 + ... + 32889234.

It is an arithmetic number, because the mean of its divisors is an integer number (1433678400).

Almost surely, 2^56666666679 is an apocalyptic number.

56666666679 is a deficient number, since it is larger than the sum of its proper divisors (35088750921).

56666666679 is a wasteful number, since it uses less digits than its factorization.

56666666679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484.

The product of its digits is 529079040, while the sum is 69.

The spelling of 56666666679 in words is "fifty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred seventy-nine".