56677077666 has 48 divisors (see below), whose sum is σ = 134140395168. Its totient is φ = 17152257600.

The previous prime is 56677077661. The next prime is 56677077671. The reversal of 56677077666 is 66677077665.

It is an interprime number because it is at equal distance from previous prime (56677077661) and next prime (56677077671).

It is a super-2 number, since 2×56677077666² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56677077661) 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 23 ways as a sum of consecutive naturals, for example, 37396 + ... + 338751.

It is an arithmetic number, because the mean of its divisors is an integer number (2794591566).

Almost surely, 2^56677077666 is an apocalyptic number.

56677077666 is an abundant number, since it is smaller than the sum of its proper divisors (77463317502).

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

56677077666 is a wasteful number, since it uses less digits than its factorization.

56677077666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376927 (or 376924 counting only the distinct ones).

The product of its (nonzero) digits is 93350880, while the sum is 63.

Subtracting 56677077666 from its reverse (66677077665), we obtain a palindrome (9999999999).

The spelling of 56677077666 in words is "fifty-six billion, six hundred seventy-seven million, seventy-seven thousand, six hundred sixty-six".