660604992 has 112 divisors (see below), whose sum is σ = 1796978880. Its totient is φ = 214106112.

The previous prime is 660604981. The next prime is 660605003. The reversal of 660604992 is 299406066.

It is an interprime number because it is at equal distance from previous prime (660604981) and next prime (660605003).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1144608 + ... + 1145184.

Almost surely, 2^660604992 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 660604992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (898489440).

660604992 is an abundant number, since it is smaller than the sum of its proper divisors (1136373888).

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

660604992 is a wasteful number, since it uses less digits than its factorization.

660604992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748 (or 738 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 660604992 is about 25702.2371010774. The cubic root of 660604992 is about 870.9247189786.

The spelling of 660604992 in words is "six hundred sixty million, six hundred four thousand, nine hundred ninety-two".