27766 has 4 divisors (see below), whose sum is σ = 41652. Its totient is φ = 13882.

The previous prime is 27763. The next prime is 27767. The reversal of 27766 is 66772.

27766 is nontrivially palindromic in base 8.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6940 + ... + 6943.

It is an arithmetic number, because the mean of its divisors is an integer number (10413).

2²⁷⁷⁶⁶ is an apocalyptic number.

27766 is a deficient number, since it is larger than the sum of its proper divisors (13886).

27766 is a wasteful number, since it uses less digits than its factorization.

27766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13885.

The product of its digits is 3528, while the sum is 28.

The square root of 27766 is about 166.6313295872. The cubic root of 27766 is about 30.2810622803.

It can be divided in two parts, 277 and 66, that added together give a palindrome (343).

The spelling of 27766 in words is "twenty-seven thousand, seven hundred sixty-six".