27808966663 has 2 divisors, whose sum is σ = 27808966664. Its totient is φ = 27808966662.

The previous prime is 27808966631. The next prime is 27808966667. The reversal of 27808966663 is 36666980872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27808966663 - 2⁵ = 27808966631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27808966667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13904483331 + 13904483332.

It is an arithmetic number, because the mean of its divisors is an integer number (13904483332).

Almost surely, 2^27808966663 is an apocalyptic number.

27808966663 is a deficient number, since it is larger than the sum of its proper divisors (1).

27808966663 is an equidigital number, since it uses as much as digits as its factorization.

27808966663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31352832, while the sum is 61.

The spelling of 27808966663 in words is "twenty-seven billion, eight hundred eight million, nine hundred sixty-six thousand, six hundred sixty-three".