27720166 has 16 divisors (see below), whose sum is σ = 44859744. Its totient is φ = 12797824.

The previous prime is 27720151. The next prime is 27720167. The reversal of 27720166 is 66102772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27720167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5890 + ... + 9493.

It is an arithmetic number, because the mean of its divisors is an integer number (2803734).

Almost surely, 2^27720166 is an apocalyptic number.

27720166 is a deficient number, since it is larger than the sum of its proper divisors (17139578).

27720166 is a wasteful number, since it uses less digits than its factorization.

27720166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15455.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 27720166 is about 5264.9943969581. The cubic root of 27720166 is about 302.6439121264.

The spelling of 27720166 in words is "twenty-seven million, seven hundred twenty thousand, one hundred sixty-six".