664382664 has 96 divisors (see below), whose sum is σ = 1967322240. Its totient is φ = 200880000.

The previous prime is 664382629. The next prime is 664382701. The reversal of 664382664 is 466283466.

664382664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 594234 + ... + 595350.

It is an arithmetic number, because the mean of its divisors is an integer number (20492940).

Almost surely, 2^664382664 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 664382664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (983661120).

664382664 is an abundant number, since it is smaller than the sum of its proper divisors (1302939576).

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

664382664 is a wasteful number, since it uses less digits than its factorization.

664382664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1891 (or 1884 counting only the distinct ones).

The product of its digits is 995328, while the sum is 45.

The square root of 664382664 is about 25775.6215056010. The cubic root of 664382664 is about 872.5816932125.

The spelling of 664382664 in words is "six hundred sixty-four million, three hundred eighty-two thousand, six hundred sixty-four".