664730347 has 4 divisors (see below), whose sum is σ = 665484040. Its totient is φ = 663976656.

The previous prime is 664730321. The next prime is 664730357. The reversal of 664730347 is 743037466.

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 664730347 - 2²³ = 656341739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664730357) 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, 375522 + ... + 377287.

It is an arithmetic number, because the mean of its divisors is an integer number (166371010).

Almost surely, 2^664730347 is an apocalyptic number.

664730347 is a deficient number, since it is larger than the sum of its proper divisors (753693).

664730347 is an equidigital number, since it uses as much as digits as its factorization.

664730347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753692.

The product of its (nonzero) digits is 254016, while the sum is 40.

The square root of 664730347 is about 25782.3650389176. The cubic root of 664730347 is about 872.7338790591.

The spelling of 664730347 in words is "six hundred sixty-four million, seven hundred thirty thousand, three hundred forty-seven".