664433699 has 2 divisors, whose sum is σ = 664433700. Its totient is φ = 664433698.

The previous prime is 664433681. The next prime is 664433711. The reversal of 664433699 is 996334466.

It is a happy number.

664433699 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664433699 - 2²⁴ = 647656483 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (664433669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332216849 + 332216850.

It is an arithmetic number, because the mean of its divisors is an integer number (332216850).

Almost surely, 2^664433699 is an apocalyptic number.

664433699 is a deficient number, since it is larger than the sum of its proper divisors (1).

664433699 is an equidigital number, since it uses as much as digits as its factorization.

664433699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 50.

The square root of 664433699 is about 25776.6114724182. The cubic root of 664433699 is about 872.6040352898.

The spelling of 664433699 in words is "six hundred sixty-four million, four hundred thirty-three thousand, six hundred ninety-nine".