664511232 has 288 divisors, whose sum is σ = 2338205184. Its totient is φ = 162201600.

The previous prime is 664511201. The next prime is 664511261. The reversal of 664511232 is 232115466.

It is a self number, because there is not a number n which added to its sum of digits gives 664511232.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1004982 + ... + 1005642.

It is an arithmetic number, because the mean of its divisors is an integer number (8118768).

Almost surely, 2^664511232 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 664511232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1169102592).

664511232 is an abundant number, since it is smaller than the sum of its proper divisors (1673693952).

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

664511232 is a wasteful number, since it uses less digits than its factorization.

664511232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715 (or 701 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 664511232 is about 25778.1153694369. The cubic root of 664511232 is about 872.6379754594.

Adding to 664511232 its reverse (232115466), we get a palindrome (896626698).

The spelling of 664511232 in words is "six hundred sixty-four million, five hundred eleven thousand, two hundred thirty-two".