27808966655 has 16 divisors (see below), whose sum is σ = 33513607200. Its totient is φ = 22152113280.

The previous prime is 27808966631. The next prime is 27808966663. The reversal of 27808966655 is 55666980872.

It is not a de Polignac number, because 27808966655 - 2¹⁰ = 27808965631 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1361861 + ... + 1382129.

It is an arithmetic number, because the mean of its divisors is an integer number (2094600450).

Almost surely, 2^27808966655 is an apocalyptic number.

27808966655 is a deficient number, since it is larger than the sum of its proper divisors (5704640545).

27808966655 is a wasteful number, since it uses less digits than its factorization.

27808966655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21434.

The product of its (nonzero) digits is 43545600, while the sum is 62.

The spelling of 27808966655 in words is "twenty-seven billion, eight hundred eight million, nine hundred sixty-six thousand, six hundred fifty-five".