659915980 has 24 divisors (see below), whose sum is σ = 1458762480. Its totient is φ = 250073280.

The previous prime is 659915933. The next prime is 659915981. The reversal of 659915980 is 89519956.

It is not an unprimeable number, because it can be changed into a prime (659915981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 867931 + ... + 868690.

It is an arithmetic number, because the mean of its divisors is an integer number (60781770).

Almost surely, 2^659915980 is an apocalyptic number.

It is an amenable number.

659915980 is an abundant number, since it is smaller than the sum of its proper divisors (798846500).

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

659915980 is a wasteful number, since it uses less digits than its factorization.

659915980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736649 (or 1736647 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 52.

The square root of 659915980 is about 25688.8298682521. The cubic root of 659915980 is about 870.6218217163.

The spelling of 659915980 in words is "six hundred fifty-nine million, nine hundred fifteen thousand, nine hundred eighty".