664569266688 has 200 divisors, whose sum is σ = 1984560355008. Its totient is φ = 221411874816.

The previous prime is 664569266671. The next prime is 664569266717. The reversal of 664569266688 is 886662965466.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 150250845 + ... + 150255267.

Almost surely, 2^664569266688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664569266688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (992280177504).

664569266688 is an abundant number, since it is smaller than the sum of its proper divisors (1319991088320).

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

664569266688 is an equidigital number, since it uses as much as digits as its factorization.

664569266688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8076 (or 8051 counting only the distinct ones).

The product of its digits is 1074954240, while the sum is 72.

The spelling of 664569266688 in words is "six hundred sixty-four billion, five hundred sixty-nine million, two hundred sixty-six thousand, six hundred eighty-eight".