27666216 has 24 divisors (see below), whose sum is σ = 74929530. Its totient is φ = 9222048.

The previous prime is 27666181. The next prime is 27666227. The reversal of 27666216 is 61266672.

It can be written as a sum of positive squares in only one way, i.e., 26563716 + 1102500 = 5154^2 + 1050^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 192055 + ... + 192198.

Almost surely, 2^27666216 is an apocalyptic number.

It is an amenable number.

27666216 is an abundant number, since it is smaller than the sum of its proper divisors (47263314).

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

27666216 is a wasteful number, since it uses less digits than its factorization.

27666216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384265 (or 384258 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 27666216 is about 5259.8684394194. The cubic root of 27666216 is about 302.4474457343.

The spelling of 27666216 in words is "twenty-seven million, six hundred sixty-six thousand, two hundred sixteen".