664132307 has 4 divisors (see below), whose sum is σ = 665080416. Its totient is φ = 663184200.

The previous prime is 664132283. The next prime is 664132321. The reversal of 664132307 is 703231466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 664132307 - 2¹⁰ = 664131283 is a prime.

It is a super-2 number, since 2×664132307² = 882143442402284498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664122307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473003 + ... + 474404.

It is an arithmetic number, because the mean of its divisors is an integer number (166270104).

Almost surely, 2^664132307 is an apocalyptic number.

664132307 is a deficient number, since it is larger than the sum of its proper divisors (948109).

664132307 is an equidigital number, since it uses as much as digits as its factorization.

664132307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948108.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 664132307 is about 25770.7645792669. The cubic root of 664132307 is about 872.4720754713.

The spelling of 664132307 in words is "six hundred sixty-four million, one hundred thirty-two thousand, three hundred seven".