8668440863 has 2 divisors, whose sum is σ = 8668440864. Its totient is φ = 8668440862.

The previous prime is 8668440841. The next prime is 8668440883. The reversal of 8668440863 is 3680448668.

8668440863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8668440863 - 2⁶ = 8668440799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8668440883) 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, 4334220431 + 4334220432.

It is an arithmetic number, because the mean of its divisors is an integer number (4334220432).

Almost surely, 2^8668440863 is an apocalyptic number.

8668440863 is a deficient number, since it is larger than the sum of its proper divisors (1).

8668440863 is an equidigital number, since it uses as much as digits as its factorization.

8668440863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5308416, while the sum is 53.

The square root of 8668440863 is about 93104.4621003741. The cubic root of 8668440863 is about 2054.2202066588.

The spelling of 8668440863 in words is "eight billion, six hundred sixty-eight million, four hundred forty thousand, eight hundred sixty-three".