659937920 has 192 divisors, whose sum is σ = 1731990600. Its totient is φ = 239984640.

The previous prime is 659937913. The next prime is 659937923. The reversal of 659937920 is 29739956.

It can be written as a sum of positive squares in 4 ways, for example, as 627402304 + 32535616 = 25048^2 + 5704^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659937923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17836142 + ... + 17836178.

Almost surely, 2^659937920 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 659937920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (865995300).

659937920 is an abundant number, since it is smaller than the sum of its proper divisors (1072052680).

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

659937920 is a wasteful number, since it uses less digits than its factorization.

659937920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 918540, while the sum is 50.

The square root of 659937920 is about 25689.2568985559. The cubic root of 659937920 is about 870.6314700309.

The spelling of 659937920 in words is "six hundred fifty-nine million, nine hundred thirty-seven thousand, nine hundred twenty".