660305660 has 24 divisors (see below), whose sum is σ = 1584733920. Its totient is φ = 226390464.

The previous prime is 660305629. The next prime is 660305671. The reversal of 660305660 is 66503066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2358095 + ... + 2358374.

It is an arithmetic number, because the mean of its divisors is an integer number (66030580).

Almost surely, 2^660305660 is an apocalyptic number.

It is an amenable number.

660305660 is an abundant number, since it is smaller than the sum of its proper divisors (924428260).

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

660305660 is a wasteful number, since it uses less digits than its factorization.

660305660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4716485 (or 4716483 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 660305660 is about 25696.4133684061. The cubic root of 660305660 is about 870.7931552220.

The spelling of 660305660 in words is "six hundred sixty million, three hundred five thousand, six hundred sixty".