56666666664 has 64 divisors (see below), whose sum is σ = 157433544000. Its totient is φ = 18885752640.

The previous prime is 56666666657. The next prime is 56666666669. The reversal of 56666666664 is 46666666665.

It is a happy number.

It is a super-2 number, since 2×56666666664² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56666666669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1541134 + ... + 1577474.

It is an arithmetic number, because the mean of its divisors is an integer number (2459899125).

Almost surely, 2^56666666664 is an apocalyptic number.

56666666664 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

56666666664 is an abundant number, since it is smaller than the sum of its proper divisors (100766877336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56666666664 is a wasteful number, since it uses less digits than its factorization.

56666666664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43575 (or 43565 counting only the distinct ones).

The product of its digits is 201553920, while the sum is 63.

Subtracting from 56666666664 its reverse (46666666665), we obtain a palindrome (9999999999).

The spelling of 56666666664 in words is "fifty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-four".