664908288 has 320 divisors, whose sum is σ = 2121292800. Its totient is φ = 182927360.

The previous prime is 664908271. The next prime is 664908289. The reversal of 664908288 is 882809466.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 664908288.

It is not an unprimeable number, because it can be changed into a prime (664908289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11269603 + ... + 11269661.

It is an arithmetic number, because the mean of its divisors is an integer number (6629040).

Almost surely, 2^664908288 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 664908288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1060646400).

664908288 is an abundant number, since it is smaller than the sum of its proper divisors (1456384512).

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

664908288 is a wasteful number, since it uses less digits than its factorization.

664908288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 51.

The square root of 664908288 is about 25785.8156357328. The cubic root of 664908288 is about 872.8117458638.

The spelling of 664908288 in words is "six hundred sixty-four million, nine hundred eight thousand, two hundred eighty-eight".