27992879866 has 16 divisors (see below), whose sum is σ = 47992907520. Its totient is φ = 11995670160.

The previous prime is 27992879843. The next prime is 27992879897. The reversal of 27992879866 is 66897829972.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36136 + ... + 239356.

It is an arithmetic number, because the mean of its divisors is an integer number (2999556720).

Almost surely, 2^27992879866 is an apocalyptic number.

27992879866 is a deficient number, since it is larger than the sum of its proper divisors (20000027654).

27992879866 is a wasteful number, since it uses less digits than its factorization.

27992879866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213069.

The product of its digits is 329204736, while the sum is 73.

The spelling of 27992879866 in words is "twenty-seven billion, nine hundred ninety-two million, eight hundred seventy-nine thousand, eight hundred sixty-six".