660547992 has 96 divisors (see below), whose sum is σ = 1801818000. Its totient is φ = 201696768.

The previous prime is 660547963. The next prime is 660548023. The reversal of 660547992 is 299745066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 603798 + ... + 604890.

Almost surely, 2^660547992 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 660547992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (900909000).

660547992 is an abundant number, since it is smaller than the sum of its proper divisors (1141270008).

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

660547992 is a wasteful number, since it uses less digits than its factorization.

660547992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277 (or 1260 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 48.

The square root of 660547992 is about 25701.1282242628. The cubic root of 660547992 is about 870.8996691443.

The spelling of 660547992 in words is "six hundred sixty million, five hundred forty-seven thousand, nine hundred ninety-two".