664130740 has 96 divisors (see below), whose sum is σ = 1775854080. Its totient is φ = 202922496.

The previous prime is 664130737. The next prime is 664130749. The reversal of 664130740 is 47031466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664130749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46489 + ... + 59071.

It is an arithmetic number, because the mean of its divisors is an integer number (18498480).

Almost surely, 2^664130740 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 664130740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (887927040).

664130740 is an abundant number, since it is smaller than the sum of its proper divisors (1111723340).

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

664130740 is a wasteful number, since it uses less digits than its factorization.

664130740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12641 (or 12639 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 664130740 is about 25770.7341765810. The cubic root of 664130740 is about 872.4713892803.

The spelling of 664130740 in words is "six hundred sixty-four million, one hundred thirty thousand, seven hundred forty".