660699672 has 32 divisors (see below), whose sum is σ = 1652394480. Its totient is φ = 220147200.

The previous prime is 660699667. The next prime is 660699703. The reversal of 660699672 is 276996066.

It is a super-3 number, since 3×660699672³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97548 + ... + 104100.

Almost surely, 2^660699672 is an apocalyptic number.

It is an amenable number.

660699672 is an abundant number, since it is smaller than the sum of its proper divisors (991694808).

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

660699672 is a wasteful number, since it uses less digits than its factorization.

660699672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10763 (or 10759 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 51.

The square root of 660699672 is about 25704.0788981049. The cubic root of 660699672 is about 870.9663248875.

The spelling of 660699672 in words is "six hundred sixty million, six hundred ninety-nine thousand, six hundred seventy-two".