660133986 has 24 divisors (see below), whose sum is σ = 1393417584. Its totient is φ = 208462680.

The previous prime is 660133973. The next prime is 660134003. The reversal of 660133986 is 689331066.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150220 + ... + 154551.

It is an arithmetic number, because the mean of its divisors is an integer number (58059066).

Almost surely, 2^660133986 is an apocalyptic number.

660133986 is an abundant number, since it is smaller than the sum of its proper divisors (733283598).

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

660133986 is a wasteful number, since it uses less digits than its factorization.

660133986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304814 (or 304795 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 660133986 is about 25693.0727239854. The cubic root of 660133986 is about 870.7176823460.

The spelling of 660133986 in words is "six hundred sixty million, one hundred thirty-three thousand, nine hundred eighty-six".