664022304 has 144 divisors (see below), whose sum is σ = 2070956160. Its totient is φ = 200148480.

The previous prime is 664022287. The next prime is 664022311. The reversal of 664022304 is 403220466.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-3 number, since 3×664022304³ (a number of 27 digits) contains 333 as substring.

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, 756714 + ... + 757590.

It is an arithmetic number, because the mean of its divisors is an integer number (14381640).

Almost surely, 2^664022304 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 664022304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1035478080).

664022304 is an abundant number, since it is smaller than the sum of its proper divisors (1406933856).

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

664022304 is a wasteful number, since it uses less digits than its factorization.

664022304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143 (or 1132 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 664022304 is about 25768.6302313491. The cubic root of 664022304 is about 872.4239024170.

The spelling of 664022304 in words is "six hundred sixty-four million, twenty-two thousand, three hundred four".