663618959 has 2 divisors, whose sum is σ = 663618960. Its totient is φ = 663618958.

The previous prime is 663618941. The next prime is 663619003. The reversal of 663618959 is 959816366.

663618959 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 663618959 - 2²⁰ = 662570383 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 663618959.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663618929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331809479 + 331809480.

It is an arithmetic number, because the mean of its divisors is an integer number (331809480).

Almost surely, 2^663618959 is an apocalyptic number.

663618959 is a deficient number, since it is larger than the sum of its proper divisors (1).

663618959 is an equidigital number, since it uses as much as digits as its factorization.

663618959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2099520, while the sum is 53.

The square root of 663618959 is about 25760.8027631128. The cubic root of 663618959 is about 872.2472220607.

The spelling of 663618959 in words is "six hundred sixty-three million, six hundred eighteen thousand, nine hundred fifty-nine".