659686956 has 12 divisors (see below), whose sum is σ = 1539269592. Its totient is φ = 219895648.

The previous prime is 659686939. The next prime is 659686961.

659686956 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 659686956.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27486945 + ... + 27486968.

It is an arithmetic number, because the mean of its divisors is an integer number (128272466).

Almost surely, 2^659686956 is an apocalyptic number.

It is an amenable number.

659686956 is an abundant number, since it is smaller than the sum of its proper divisors (879582636).

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

659686956 is a wasteful number, since it uses less digits than its factorization.

659686956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54973920 (or 54973918 counting only the distinct ones).

The product of its digits is 20995200, while the sum is 60.

The square root of 659686956 is about 25684.3718241268. The cubic root of 659686956 is about 870.5210935584.

The spelling of 659686956 in words is "six hundred fifty-nine million, six hundred eighty-six thousand, nine hundred fifty-six".