664050660 has 96 divisors (see below), whose sum is σ = 2288439552. Its totient is φ = 140106240.

The previous prime is 664050643. The next prime is 664050701. The reversal of 664050660 is 66050466.

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, 55351 + ... + 66270.

It is an arithmetic number, because the mean of its divisors is an integer number (23837912).

Almost surely, 2^664050660 is an apocalyptic number.

664050660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

664050660 is an abundant number, since it is smaller than the sum of its proper divisors (1624388892).

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

664050660 is a wasteful number, since it uses less digits than its factorization.

664050660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121653 (or 121651 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 664050660 is about 25769.1804293423. The cubic root of 664050660 is about 872.4363207248.

The spelling of 664050660 in words is "six hundred sixty-four million, fifty thousand, six hundred sixty".