664324752 has 120 divisors (see below), whose sum is σ = 2150029056. Its totient is φ = 175198464.

The previous prime is 664324693. The next prime is 664324757. The reversal of 664324752 is 257423466.

It is a super-2 number, since 2×664324752² = 882654752239723008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 664324752.

It is not an unprimeable number, because it can be changed into a prime (664324757) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 19713 + ... + 41439.

Almost surely, 2^664324752 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 664324752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1075014528).

664324752 is an abundant number, since it is smaller than the sum of its proper divisors (1485704304).

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

664324752 is a wasteful number, since it uses less digits than its factorization.

664324752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21765 (or 21752 counting only the distinct ones).

The product of its digits is 241920, while the sum is 39.

The square root of 664324752 is about 25774.4980940464. The cubic root of 664324752 is about 872.5563391397.

The spelling of 664324752 in words is "six hundred sixty-four million, three hundred twenty-four thousand, seven hundred fifty-two".