660465860 has 48 divisors (see below), whose sum is σ = 1430364096. Its totient is φ = 256044672.

The previous prime is 660465857. The next prime is 660465899. The reversal of 660465860 is 68564066.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84227 + ... + 91733.

It is an arithmetic number, because the mean of its divisors is an integer number (29799252).

Almost surely, 2^660465860 is an apocalyptic number.

It is an amenable number.

660465860 is an abundant number, since it is smaller than the sum of its proper divisors (769898236).

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

660465860 is a wasteful number, since it uses less digits than its factorization.

660465860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7652 (or 7650 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 660465860 is about 25699.5303459032. The cubic root of 660465860 is about 870.8635719960.

The spelling of 660465860 in words is "six hundred sixty million, four hundred sixty-five thousand, eight hundred sixty".