56660077880 has 96 divisors (see below), whose sum is σ = 148374620640. Its totient is φ = 19416418560.

The previous prime is 56660077861. The next prime is 56660077883. The reversal of 56660077880 is 8877006665.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56660077883) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4566485 + ... + 4578875.

It is an arithmetic number, because the mean of its divisors is an integer number (1545568965).

Almost surely, 2^56660077880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56660077880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74187310320).

56660077880 is an abundant number, since it is smaller than the sum of its proper divisors (91714542760).

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

56660077880 is a wasteful number, since it uses less digits than its factorization.

56660077880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14749 (or 14738 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 56660077880 in words is "fifty-six billion, six hundred sixty million, seventy-seven thousand, eight hundred eighty".