27655 has 4 divisors (see below), whose sum is σ = 33192. Its totient is φ = 22120.

The previous prime is 27653. The next prime is 27673. The reversal of 27655 is 55672.

It is a happy number.

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

It is not a de Polignac number, because 27655 - 2¹ = 27653 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 (27653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2761 + ... + 2770.

It is an arithmetic number, because the mean of its divisors is an integer number (8298).

2²⁷⁶⁵⁵ is an apocalyptic number.

27655 is a deficient number, since it is larger than the sum of its proper divisors (5537).

27655 is an equidigital number, since it uses as much as digits as its factorization.

27655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5536.

The product of its digits is 2100, while the sum is 25.

The square root of 27655 is about 166.2979254230. The cubic root of 27655 is about 30.2406569056.

The spelling of 27655 in words is "twenty-seven thousand, six hundred fifty-five".