660064020 has 96 divisors (see below), whose sum is σ = 2304239616. Its totient is φ = 137155200.

The previous prime is 660064019. The next prime is 660064037. The reversal of 660064020 is 20460066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66816 + ... + 76055.

It is an arithmetic number, because the mean of its divisors is an integer number (24002496).

Almost surely, 2^660064020 is an apocalyptic number.

660064020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

660064020 is an abundant number, since it is smaller than the sum of its proper divisors (1644175596).

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

660064020 is a wasteful number, since it uses less digits than its factorization.

660064020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142901 (or 142899 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 660064020 is about 25691.7111146767. The cubic root of 660064020 is about 870.6869195074.

The spelling of 660064020 in words is "six hundred sixty million, sixty-four thousand, twenty".