655960 has 48 divisors (see below), whose sum is σ = 1592640. Its totient is φ = 242880.

The previous prime is 655943. The next prime is 655961. The reversal of 655960 is 69556.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21145 + ... + 21175.

It is an arithmetic number, because the mean of its divisors is an integer number (33180).

2⁶⁵⁵⁹⁶⁰ 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 655960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (796320).

655960 is an abundant number, since it is smaller than the sum of its proper divisors (936680).

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

655960 is a wasteful number, since it uses less digits than its factorization.

655960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 655960 is about 809.9135756363. The cubic root of 655960 is about 86.8878636301.

The spelling of 655960 in words is "six hundred fifty-five thousand, nine hundred sixty".