664146713 has 2 divisors, whose sum is σ = 664146714. Its totient is φ = 664146712.

The previous prime is 664146683. The next prime is 664146733. The reversal of 664146713 is 317641466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 420537049 + 243609664 = 20507^2 + 15608^2 .

It is a cyclic number.

It is not a de Polignac number, because 664146713 - 2⁶ = 664146649 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (664146733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332073356 + 332073357.

It is an arithmetic number, because the mean of its divisors is an integer number (332073357).

Almost surely, 2^664146713 is an apocalyptic number.

It is an amenable number.

664146713 is a deficient number, since it is larger than the sum of its proper divisors (1).

664146713 is an equidigital number, since it uses as much as digits as its factorization.

664146713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 664146713 is about 25771.0440805180. The cubic root of 664146713 is about 872.4783838237.

The spelling of 664146713 in words is "six hundred sixty-four million, one hundred forty-six thousand, seven hundred thirteen".