663665059 has 2 divisors, whose sum is σ = 663665060. Its totient is φ = 663665058.

The previous prime is 663665021. The next prime is 663665089. The reversal of 663665059 is 950566366.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663665059 is a prime.

It is not a weakly prime, because it can be changed into another prime (663665089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331832529 + 331832530.

It is an arithmetic number, because the mean of its divisors is an integer number (331832530).

Almost surely, 2^663665059 is an apocalyptic number.

663665059 is a deficient number, since it is larger than the sum of its proper divisors (1).

663665059 is an equidigital number, since it uses as much as digits as its factorization.

663665059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 874800, while the sum is 46.

The square root of 663665059 is about 25761.6975178267. The cubic root of 663665059 is about 872.2674192262.

The spelling of 663665059 in words is "six hundred sixty-three million, six hundred sixty-five thousand, fifty-nine".