655980960 has 48 divisors (see below), whose sum is σ = 2066341536. Its totient is φ = 174928128.

The previous prime is 655980943. The next prime is 655981019. The reversal of 655980960 is 69089556.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×655980960² = 860622039765043200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 682834 + ... + 683793.

It is an arithmetic number, because the mean of its divisors is an integer number (43048782).

Almost surely, 2^655980960 is an apocalyptic number.

655980960 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

655980960 is an abundant number, since it is smaller than the sum of its proper divisors (1410360576).

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

655980960 is a wasteful number, since it uses less digits than its factorization.

655980960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366645 (or 1366637 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 48.

The square root of 655980960 is about 25612.1252534810. The cubic root of 655980960 is about 868.8878906773.

The spelling of 655980960 in words is "six hundred fifty-five million, nine hundred eighty thousand, nine hundred sixty".