660575216 has 40 divisors (see below), whose sum is σ = 1468831584. Its totient is φ = 281917440.

The previous prime is 660575213. The next prime is 660575233. The reversal of 660575216 is 612575066.

It is a self number, because there is not a number n which added to its sum of digits gives 660575216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660575213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14756 + ... + 39228.

Almost surely, 2^660575216 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 660575216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734415792).

660575216 is an abundant number, since it is smaller than the sum of its proper divisors (808256368).

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

660575216 is a wasteful number, since it uses less digits than its factorization.

660575216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24729 (or 24723 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 660575216 is about 25701.6578453609. The cubic root of 660575216 is about 870.9116334765.

The spelling of 660575216 in words is "six hundred sixty million, five hundred seventy-five thousand, two hundred sixteen".