664986307 has 2 divisors, whose sum is σ = 664986308. Its totient is φ = 664986306.

The previous prime is 664986299. The next prime is 664986319. The reversal of 664986307 is 703689466.

664986307 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664986307 - 2³ = 664986299 is a prime.

It is not a weakly prime, because it can be changed into another prime (664986347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332493153 + 332493154.

It is an arithmetic number, because the mean of its divisors is an integer number (332493154).

Almost surely, 2^664986307 is an apocalyptic number.

664986307 is a deficient number, since it is larger than the sum of its proper divisors (1).

664986307 is an equidigital number, since it uses as much as digits as its factorization.

664986307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The square root of 664986307 is about 25787.3284192062. The cubic root of 664986307 is about 872.8458825197.

The spelling of 664986307 in words is "six hundred sixty-four million, nine hundred eighty-six thousand, three hundred seven".