27666117 has 10 divisors (see below), whose sum is σ = 41328518. Its totient is φ = 18444024.

The previous prime is 27666101. The next prime is 27666131. The reversal of 27666117 is 71166672.

It can be written as a sum of positive squares in only one way, i.e., 17969121 + 9696996 = 4239^2 + 3114^2 .

It is not a de Polignac number, because 27666117 - 2⁴ = 27666101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27666017) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 170698 + ... + 170859.

Almost surely, 2^27666117 is an apocalyptic number.

27666117 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

27666117 is a deficient number, since it is larger than the sum of its proper divisors (13662401).

27666117 is an equidigital number, since it uses as much as digits as its factorization.

27666117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341569 (or 341560 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 27666117 is about 5259.8590285292. The cubic root of 27666117 is about 302.4470849774.

The spelling of 27666117 in words is "twenty-seven million, six hundred sixty-six thousand, one hundred seventeen".