664024260660 has 48 divisors (see below), whose sum is σ = 1871580988032. Its totient is φ = 175900464000.

The previous prime is 664024260623. The next prime is 664024260763. The reversal of 664024260660 is 66062420466.

It is a congruent number.

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, 36636871 + ... + 36654990.

It is an arithmetic number, because the mean of its divisors is an integer number (38991270584).

Almost surely, 2^664024260660 is an apocalyptic number.

664024260660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

664024260660 is an abundant number, since it is smaller than the sum of its proper divisors (1207556727372).

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

664024260660 is a wasteful number, since it uses less digits than its factorization.

664024260660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73292024 (or 73292022 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 42.

The spelling of 664024260660 in words is "six hundred sixty-four billion, twenty-four million, two hundred sixty thousand, six hundred sixty".