659699964 has 240 divisors, whose sum is σ = 2222094336. Its totient is φ = 165628800.

The previous prime is 659699947. The next prime is 659699987. The reversal of 659699964 is 469996956.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 772962 + ... + 773814.

Almost surely, 2^659699964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 659699964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1111047168).

659699964 is an abundant number, since it is smaller than the sum of its proper divisors (1562394372).

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

659699964 is a wasteful number, since it uses less digits than its factorization.

659699964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918 (or 907 counting only the distinct ones).

The product of its digits is 28343520, while the sum is 63.

The square root of 659699964 is about 25684.6250507964. The cubic root of 659699964 is about 870.5268152945.

The spelling of 659699964 in words is "six hundred fifty-nine million, six hundred ninety-nine thousand, nine hundred sixty-four".