27666331 has 12 divisors (see below), whose sum is σ = 35109720. Its totient is φ = 21557760.

The previous prime is 27666311. The next prime is 27666391. The reversal of 27666331 is 13366672.

It is not a de Polignac number, because 27666331 - 2¹³ = 27658139 is a prime.

It is a super-2 number, since 2×27666331² = 1530851742003122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27666311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25126 + ... + 26203.

It is an arithmetic number, because the mean of its divisors is an integer number (2925810).

Almost surely, 2^27666331 is an apocalyptic number.

27666331 is a deficient number, since it is larger than the sum of its proper divisors (7443389).

27666331 is a wasteful number, since it uses less digits than its factorization.

27666331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51354 (or 51347 counting only the distinct ones).

The product of its digits is 27216, while the sum is 34.

The square root of 27666331 is about 5259.8793712404. The cubic root of 27666331 is about 302.4478647942.

The spelling of 27666331 in words is "twenty-seven million, six hundred sixty-six thousand, three hundred thirty-one".