22766 has 4 divisors (see below), whose sum is σ = 34152. Its totient is φ = 11382.

The previous prime is 22751. The next prime is 22769. The reversal of 22766 is 66722.

It is a happy number.

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

It is a Curzon number.

It is a plaindrome in base 16.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5690 + ... + 5693.

It is an arithmetic number, because the mean of its divisors is an integer number (8538).

2²²⁷⁶⁶ is an apocalyptic number.

22766 is a deficient number, since it is larger than the sum of its proper divisors (11386).

22766 is a wasteful number, since it uses less digits than its factorization.

22766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11385.

The product of its digits is 1008, while the sum is 23.

The square root of 22766 is about 150.8840614512. The cubic root of 22766 is about 28.3418966811.

Subtracting 22766 from its reverse (66722), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 22766 in words is "twenty-two thousand, seven hundred sixty-six".