663288331 has 2 divisors, whose sum is σ = 663288332. Its totient is φ = 663288330.

The previous prime is 663288317. The next prime is 663288383. The reversal of 663288331 is 133882366.

663288331 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 663288331 - 2¹⁵ = 663255563 is a prime.

It is a super-2 number, since 2×663288331² = 879902820081531122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (663288391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331644165 + 331644166.

It is an arithmetic number, because the mean of its divisors is an integer number (331644166).

Almost surely, 2^663288331 is an apocalyptic number.

663288331 is a deficient number, since it is larger than the sum of its proper divisors (1).

663288331 is an equidigital number, since it uses as much as digits as its factorization.

663288331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 40.

The square root of 663288331 is about 25754.3846946496. The cubic root of 663288331 is about 872.1023410977.

The spelling of 663288331 in words is "six hundred sixty-three million, two hundred eighty-eight thousand, three hundred thirty-one".