664264480 has 96 divisors (see below), whose sum is σ = 1741279680. Its totient is φ = 237419520.

The previous prime is 664264463. The next prime is 664264487. The reversal of 664264480 is 84462466.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (664264487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100642 + ... + 107038.

It is an arithmetic number, because the mean of its divisors is an integer number (18138330).

Almost surely, 2^664264480 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 664264480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (870639840).

664264480 is an abundant number, since it is smaller than the sum of its proper divisors (1077015200).

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

664264480 is a wasteful number, since it uses less digits than its factorization.

664264480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6482 (or 6474 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 40.

The square root of 664264480 is about 25773.3288498013. The cubic root of 664264480 is about 872.5299502859.

The spelling of 664264480 in words is "six hundred sixty-four million, two hundred sixty-four thousand, four hundred eighty".