27667991856 has 20 divisors (see below), whose sum is σ = 71475645752. Its totient is φ = 9222663936.

The previous prime is 27667991837. The next prime is 27667991891. The reversal of 27667991856 is 65819976672.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 288208201 + ... + 288208296.

Almost surely, 2^27667991856 is an apocalyptic number.

It is an amenable number.

27667991856 is an abundant number, since it is smaller than the sum of its proper divisors (43807653896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27667991856 is a wasteful number, since it uses less digits than its factorization.

27667991856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576416508 (or 576416502 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 66.

The spelling of 27667991856 in words is "twenty-seven billion, six hundred sixty-seven million, nine hundred ninety-one thousand, eight hundred fifty-six".