664302560 has 96 divisors (see below), whose sum is σ = 1655422272. Its totient is φ = 251412480.

The previous prime is 664302539. The next prime is 664302563. The reversal of 664302560 is 65203466.

664302560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664302563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356030 + ... + 357890.

It is an arithmetic number, because the mean of its divisors is an integer number (17243982).

Almost surely, 2^664302560 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 664302560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (827711136).

664302560 is an abundant number, since it is smaller than the sum of its proper divisors (991119712).

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

664302560 is a wasteful number, since it uses less digits than its factorization.

664302560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996 (or 1988 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 664302560 is about 25774.0675874027. The cubic root of 664302560 is about 872.5466230152.

The spelling of 664302560 in words is "six hundred sixty-four million, three hundred two thousand, five hundred sixty".