659920864 has 24 divisors (see below), whose sum is σ = 1302671160. Its totient is φ = 329083776.

The previous prime is 659920837. The next prime is 659920867. The reversal of 659920864 is 468029956.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659920867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15079 + ... + 39334.

It is an arithmetic number, because the mean of its divisors is an integer number (54277965).

Almost surely, 2^659920864 is an apocalyptic number.

It is an amenable number.

659920864 is a deficient number, since it is larger than the sum of its proper divisors (642750296).

659920864 is a wasteful number, since it uses less digits than its factorization.

659920864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54802 (or 54794 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 49.

The square root of 659920864 is about 25688.9249288482. The cubic root of 659920864 is about 870.6239695182.

The spelling of 659920864 in words is "six hundred fifty-nine million, nine hundred twenty thousand, eight hundred sixty-four".