664347530 has 32 divisors (see below), whose sum is σ = 1490901120. Its totient is φ = 207069120.

The previous prime is 664347517. The next prime is 664347623. The reversal of 664347530 is 35743466.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430625 + ... + 432164.

It is an arithmetic number, because the mean of its divisors is an integer number (46590660).

Almost surely, 2^664347530 is an apocalyptic number.

664347530 is an abundant number, since it is smaller than the sum of its proper divisors (826553590).

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

664347530 is a wasteful number, since it uses less digits than its factorization.

664347530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862814.

The product of its (nonzero) digits is 181440, while the sum is 38.

The square root of 664347530 is about 25774.9399611328. The cubic root of 664347530 is about 872.5663116022.

The spelling of 664347530 in words is "six hundred sixty-four million, three hundred forty-seven thousand, five hundred thirty".