27666684 has 60 divisors (see below), whose sum is σ = 76595904. Its totient is φ = 8678016.

The previous prime is 27666671. The next prime is 27666721. The reversal of 27666684 is 48666672.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2997 + ... + 8019.

Almost surely, 2^27666684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27666684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38297952).

27666684 is an abundant number, since it is smaller than the sum of its proper divisors (48929220).

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

27666684 is a wasteful number, since it uses less digits than its factorization.

27666684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5056 (or 5045 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 27666684 is about 5259.9129270360. The cubic root of 27666684 is about 302.4491511188.

It can be divided in two parts, 2766668 and 4, that added together give a palindrome (2766672).

The spelling of 27666684 in words is "twenty-seven million, six hundred sixty-six thousand, six hundred eighty-four".