659880 has 128 divisors (see below), whose sum is σ = 2419200. Its totient is φ = 158976.

The previous prime is 659873. The next prime is 659881. The reversal of 659880 is 88956.

It is a super-2 number, since 2×659880² = 870883228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14017 + ... + 14063.

It is an arithmetic number, because the mean of its divisors is an integer number (18900).

2⁶⁵⁹⁸⁸⁰ is an apocalyptic number.

659880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 659880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1209600).

659880 is an abundant number, since it is smaller than the sum of its proper divisors (1759320).

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

659880 is a wasteful number, since it uses less digits than its factorization.

659880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 659880 is about 812.3299822117. The cubic root of 659880 is about 87.0605998721.

The spelling of 659880 in words is "six hundred fifty-nine thousand, eight hundred eighty".