20604000666 has 64 divisors (see below), whose sum is σ = 42415027200. Its totient is φ = 6670287360.

The previous prime is 20604000647. The next prime is 20604000667. The reversal of 20604000666 is 66600040602.

It is not an unprimeable number, because it can be changed into a prime (20604000667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12126285 + ... + 12127983.

It is an arithmetic number, because the mean of its divisors is an integer number (662734800).

Almost surely, 2^20604000666 is an apocalyptic number.

20604000666 is an abundant number, since it is smaller than the sum of its proper divisors (21811026534).

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

20604000666 is a wasteful number, since it uses less digits than its factorization.

20604000666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179.

The product of its (nonzero) digits is 10368, while the sum is 30.

The spelling of 20604000666 in words is "twenty billion, six hundred four million, six hundred sixty-six", and thus it is an aban number.