2660664020 has 24 divisors (see below), whose sum is σ = 6385593984. Its totient is φ = 912227616.

The previous prime is 2660663983. The next prime is 2660664079. The reversal of 2660664020 is 204660662.

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, 9502232 + ... + 9502511.

It is an arithmetic number, because the mean of its divisors is an integer number (266066416).

Almost surely, 2^2660664020 is an apocalyptic number.

2660664020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2660664020 is an abundant number, since it is smaller than the sum of its proper divisors (3724929964).

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

2660664020 is a wasteful number, since it uses less digits than its factorization.

2660664020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19004759 (or 19004757 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 2660664020 is about 51581.6248290028. The cubic root of 2660664020 is about 1385.6812663182.

The spelling of 2660664020 in words is "two billion, six hundred sixty million, six hundred sixty-four thousand, twenty".