56677599577666 has 8 divisors (see below), whose sum is σ = 85200020100864. Its totient is φ = 28277592877380.

The previous prime is 56677599577637. The next prime is 56677599577741. The reversal of 56677599577666 is 66677599577665.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30603454570 + ... + 30603456421.

It is an arithmetic number, because the mean of its divisors is an integer number (10650002512608).

Almost surely, 2^{56677599577666} is an apocalyptic number.

56677599577666 is a deficient number, since it is larger than the sum of its proper divisors (28522420523198).

56677599577666 is a wasteful number, since it uses less digits than its factorization.

56677599577666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61206911456.

The product of its digits is 189035532000, while the sum is 91.

Subtracting 56677599577666 from its reverse (66677599577665), we obtain a palindrome (9999999999999).

The spelling of 56677599577666 in words is "fifty-six trillion, six hundred seventy-seven billion, five hundred ninety-nine million, five hundred seventy-seven thousand, six hundred sixty-six".