56682828666 has 24 divisors (see below), whose sum is σ = 123105921120. Its totient is φ = 18849179976.

The previous prime is 56682828641. The next prime is 56682828673. The reversal of 56682828666 is 66682828665.

It is a super-2 number, since 2×56682828666² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3750270 + ... + 3765353.

It is an arithmetic number, because the mean of its divisors is an integer number (5129413380).

Almost surely, 2^56682828666 is an apocalyptic number.

56682828666 is an abundant number, since it is smaller than the sum of its proper divisors (66423092454).

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

56682828666 is a wasteful number, since it uses less digits than its factorization.

56682828666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7516050 (or 7516047 counting only the distinct ones).

The product of its digits is 79626240, while the sum is 63.

Subtracting 56682828666 from its reverse (66682828665), we obtain a palindrome (9999999999).

The spelling of 56682828666 in words is "fifty-six billion, six hundred eighty-two million, eight hundred twenty-eight thousand, six hundred sixty-six".