8318660663 has 2 divisors, whose sum is σ = 8318660664. Its totient is φ = 8318660662.

The previous prime is 8318660639. The next prime is 8318660671. The reversal of 8318660663 is 3660668138.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8318660663 - 2²⁰ = 8317612087 is a prime.

It is a super-2 number, since 2×8318660663² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8318662663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4159330331 + 4159330332.

It is an arithmetic number, because the mean of its divisors is an integer number (4159330332).

Almost surely, 2^8318660663 is an apocalyptic number.

8318660663 is a deficient number, since it is larger than the sum of its proper divisors (1).

8318660663 is an equidigital number, since it uses as much as digits as its factorization.

8318660663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 8318660663 is about 91206.6919858406. The cubic root of 8318660663 is about 2026.2100708858.

The spelling of 8318660663 in words is "eight billion, three hundred eighteen million, six hundred sixty thousand, six hundred sixty-three".