8218663 has 2 divisors, whose sum is σ = 8218664. Its totient is φ = 8218662.

The previous prime is 8218619. The next prime is 8218669. The reversal of 8218663 is 3668128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8218663 - 2¹⁷ = 8087591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8218669) 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, 4109331 + 4109332.

It is an arithmetic number, because the mean of its divisors is an integer number (4109332).

Almost surely, 2^8218663 is an apocalyptic number.

8218663 is a deficient number, since it is larger than the sum of its proper divisors (1).

8218663 is an equidigital number, since it uses as much as digits as its factorization.

8218663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 34.

The square root of 8218663 is about 2866.8210617337. The cubic root of 8218663 is about 201.8058373496.

The spelling of 8218663 in words is "eight million, two hundred eighteen thousand, six hundred sixty-three".