27966685 has 4 divisors (see below), whose sum is σ = 33560028. Its totient is φ = 22373344.

The previous prime is 27966677. The next prime is 27966703. The reversal of 27966685 is 58666972.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3345241 + 24621444 = 1829^2 + 4962^2 .

It is a cyclic number.

It is not a de Polignac number, because 27966685 - 2³ = 27966677 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2796664 + ... + 2796673.

It is an arithmetic number, because the mean of its divisors is an integer number (8390007).

Almost surely, 2^27966685 is an apocalyptic number.

It is an amenable number.

27966685 is a deficient number, since it is larger than the sum of its proper divisors (5593343).

27966685 is an equidigital number, since it uses as much as digits as its factorization.

27966685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5593342.

The product of its digits is 1088640, while the sum is 49.

The square root of 27966685 is about 5288.3537135861. The cubic root of 27966685 is about 303.5384161036.

The spelling of 27966685 in words is "twenty-seven million, nine hundred sixty-six thousand, six hundred eighty-five".