27728745166 has 8 divisors (see below), whose sum is σ = 41656815144. Its totient is φ = 13843140120.

The previous prime is 27728745097. The next prime is 27728745193. The reversal of 27728745166 is 66154782772.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10614600 + ... + 10617211.

It is an arithmetic number, because the mean of its divisors is an integer number (5207101893).

Almost surely, 2^27728745166 is an apocalyptic number.

27728745166 is a deficient number, since it is larger than the sum of its proper divisors (13928069978).

27728745166 is a wasteful number, since it uses less digits than its factorization.

27728745166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21232466.

The product of its digits is 7902720, while the sum is 55.

The spelling of 27728745166 in words is "twenty-seven billion, seven hundred twenty-eight million, seven hundred forty-five thousand, one hundred sixty-six".