27768861166 has 8 divisors (see below), whose sum is σ = 41660839224. Its totient is φ = 13881914760.

The previous prime is 27768861161. The next prime is 27768861199. The reversal of 27768861166 is 66116886772.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×27768861166² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27768861166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27768861161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1244085 + ... + 1266208.

It is an arithmetic number, because the mean of its divisors is an integer number (5207604903).

Almost surely, 2^27768861166 is an apocalyptic number.

27768861166 is a deficient number, since it is larger than the sum of its proper divisors (13891978058).

27768861166 is a wasteful number, since it uses less digits than its factorization.

27768861166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515826.

The product of its digits is 8128512, while the sum is 58.

The spelling of 27768861166 in words is "twenty-seven billion, seven hundred sixty-eight million, eight hundred sixty-one thousand, one hundred sixty-six".