22866 has 16 divisors (see below), whose sum is σ = 47424. Its totient is φ = 7344.

The previous prime is 22861. The next prime is 22871. The reversal of 22866 is 66822.

22866 = T₁₅ + T₁₆ + ... + T₅₁.

It is an interprime number because it is at equal distance from previous prime (22861) and next prime (22871).

It is a plaindrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22861) 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 7 ways as a sum of consecutive naturals, for example, 171 + ... + 273.

It is an arithmetic number, because the mean of its divisors is an integer number (2964).

2²²⁸⁶⁶ is an apocalyptic number.

22866 is an abundant number, since it is smaller than the sum of its proper divisors (24558).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23712).

22866 is a wasteful number, since it uses less digits than its factorization.

22866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145.

The product of its digits is 1152, while the sum is 24.

The square root of 22866 is about 151.2150786132. The cubic root of 22866 is about 28.3833334732.

Subtracting 22866 from its reverse (66822), we obtain a triangular number (43956 = T₂₉₆).

It can be divided in two parts, 22 and 866, that added together give a palindrome (888).

The spelling of 22866 in words is "twenty-two thousand, eight hundred sixty-six".