659989956 has 24 divisors (see below), whose sum is σ = 1577538144. Its totient is φ = 214630720.

The previous prime is 659989949. The next prime is 659990011.

659989956 is nontrivially palindromic in base 10.

659989956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 670230 + ... + 671213.

It is an arithmetic number, because the mean of its divisors is an integer number (65730756).

Almost surely, 2^659989956 is an apocalyptic number.

It is an amenable number.

659989956 is an abundant number, since it is smaller than the sum of its proper divisors (917548188).

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

659989956 is a wasteful number, since it uses less digits than its factorization.

659989956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341491 (or 1341489 counting only the distinct ones).

The product of its digits is 47239200, while the sum is 66.

The square root of 659989956 is about 25690.2696755017. The cubic root of 659989956 is about 870.6543524805.

The spelling of 659989956 in words is "six hundred fifty-nine million, nine hundred eighty-nine thousand, nine hundred fifty-six".