660502660 has 12 divisors (see below), whose sum is σ = 1387055628. Its totient is φ = 264201056.

The previous prime is 660502657. The next prime is 660502669. The reversal of 660502660 is 66205066.

660502660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 498093124 + 162409536 = 22318^2 + 12744^2 .

It is not an unprimeable number, because it can be changed into a prime (660502669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16512547 + ... + 16512586.

It is an arithmetic number, because the mean of its divisors is an integer number (115587969).

Almost surely, 2^660502660 is an apocalyptic number.

It is an amenable number.

660502660 is an abundant number, since it is smaller than the sum of its proper divisors (726552968).

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

660502660 is a wasteful number, since it uses less digits than its factorization.

660502660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33025142 (or 33025140 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 660502660 is about 25700.2463023217. The cubic root of 660502660 is about 870.8797460262.

The spelling of 660502660 in words is "six hundred sixty million, five hundred two thousand, six hundred sixty".