56676867666 has 32 divisors (see below), whose sum is σ = 117851606208. Its totient is φ = 18156399360.

The previous prime is 56676867661. The next prime is 56676867671. The reversal of 56676867666 is 66676867665.

It is an interprime number because it is at equal distance from previous prime (56676867661) and next prime (56676867671).

It is a self number, because there is not a number n which added to its sum of digits gives 56676867666.

It is not an unprimeable number, because it can be changed into a prime (56676867661) 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, 1702875 + ... + 1735838.

It is an arithmetic number, because the mean of its divisors is an integer number (3682862694).

Almost surely, 2^56676867666 is an apocalyptic number.

56676867666 is an abundant number, since it is smaller than the sum of its proper divisors (61174738542).

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

56676867666 is a wasteful number, since it uses less digits than its factorization.

56676867666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3438826.

The product of its digits is 548674560, while the sum is 69.

Subtracting 56676867666 from its reverse (66676867665), we obtain a palindrome (9999999999).

The spelling of 56676867666 in words is "fifty-six billion, six hundred seventy-six million, eight hundred sixty-seven thousand, six hundred sixty-six".