660948985872 has 120 divisors (see below), whose sum is σ = 2121458465984. Its totient is φ = 188175197952.

The previous prime is 660948985847. The next prime is 660948985901. The reversal of 660948985872 is 278589849066.

660948985872 is a `hidden beast` number, since 6 + 60 + 9 + 489 + 8 + 5 + 87 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 660948985872.

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, 873223 + ... + 1443750.

Almost surely, 2^660948985872 is an apocalyptic number.

It is an amenable number.

660948985872 is an abundant number, since it is smaller than the sum of its proper divisors (1460509480112).

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

660948985872 is a wasteful number, since it uses less digits than its factorization.

660948985872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317277 (or 2317268 counting only the distinct ones).

The product of its (nonzero) digits is 418037760, while the sum is 72.

The spelling of 660948985872 in words is "six hundred sixty billion, nine hundred forty-eight million, nine hundred eighty-five thousand, eight hundred seventy-two".