664466328 has 160 divisors (see below), whose sum is σ = 2027718000. Its totient is φ = 202487040.

The previous prime is 664466311. The next prime is 664466359. The reversal of 664466328 is 823664466.

664466328 is a `hidden beast` number, since 6 + 6 + 4 + 4 + 6 + 632 + 8 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 356118 + ... + 357978.

Almost surely, 2^664466328 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 664466328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1013859000).

664466328 is an abundant number, since it is smaller than the sum of its proper divisors (1363251672).

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

664466328 is a wasteful number, since it uses less digits than its factorization.

664466328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927 (or 1914 counting only the distinct ones).

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

The square root of 664466328 is about 25777.2443833704. The cubic root of 664466328 is about 872.6183189979.

The spelling of 664466328 in words is "six hundred sixty-four million, four hundred sixty-six thousand, three hundred twenty-eight".