660168864 has 36 divisors (see below), whose sum is σ = 1877356026. Its totient is φ = 220056192.

The previous prime is 660168833. The next prime is 660168893. The reversal of 660168864 is 468861066.

It can be written as a sum of positive squares in only one way, i.e., 660078864 + 90000 = 25692^2 + 300^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1145839 + ... + 1146414.

Almost surely, 2^660168864 is an apocalyptic number.

It is an amenable number.

660168864 is an abundant number, since it is smaller than the sum of its proper divisors (1217187162).

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

660168864 is a wasteful number, since it uses less digits than its factorization.

660168864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292269 (or 2292258 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 660168864 is about 25693.7514582826. The cubic root of 660168864 is about 870.7330167867.

The spelling of 660168864 in words is "six hundred sixty million, one hundred sixty-eight thousand, eight hundred sixty-four".