660725238972 has 12 divisors (see below), whose sum is σ = 1541692224296. Its totient is φ = 220241746320.

The previous prime is 660725238937. The next prime is 660725238989. The reversal of 660725238972 is 279832527066.

660725238972 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27530218279 + ... + 27530218302.

Almost surely, 2^660725238972 is an apocalyptic number.

It is an amenable number.

660725238972 is an abundant number, since it is smaller than the sum of its proper divisors (880966985324).

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

660725238972 is a wasteful number, since it uses less digits than its factorization.

660725238972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55060436588 (or 55060436586 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 57.

The spelling of 660725238972 in words is "six hundred sixty billion, seven hundred twenty-five million, two hundred thirty-eight thousand, nine hundred seventy-two".