663307907 has 2 divisors, whose sum is σ = 663307908. Its totient is φ = 663307906.

The previous prime is 663307903. The next prime is 663307943. The reversal of 663307907 is 709703366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 663307907 - 2² = 663307903 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (663307901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331653953 + 331653954.

It is an arithmetic number, because the mean of its divisors is an integer number (331653954).

Almost surely, 2^663307907 is an apocalyptic number.

663307907 is a deficient number, since it is larger than the sum of its proper divisors (1).

663307907 is an equidigital number, since it uses as much as digits as its factorization.

663307907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884, while the sum is 41.

The square root of 663307907 is about 25754.7647436353. The cubic root of 663307907 is about 872.1109206283.

The spelling of 663307907 in words is "six hundred sixty-three million, three hundred seven thousand, nine hundred seven".