655756880 has 160 divisors (see below), whose sum is σ = 1676083200. Its totient is φ = 237758976.

The previous prime is 655756879. The next prime is 655756889. The reversal of 655756880 is 88657556.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655756889) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5163377 + ... + 5163503.

It is an arithmetic number, because the mean of its divisors is an integer number (10475520).

Almost surely, 2^655756880 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 655756880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (838041600).

655756880 is an abundant number, since it is smaller than the sum of its proper divisors (1020326320).

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

655756880 is a wasteful number, since it uses less digits than its factorization.

655756880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 50.

The square root of 655756880 is about 25607.7503892864. The cubic root of 655756880 is about 868.7889434089.

The spelling of 655756880 in words is "six hundred fifty-five million, seven hundred fifty-six thousand, eight hundred eighty".