22668 has 12 divisors (see below), whose sum is σ = 52920. Its totient is φ = 7552.

The previous prime is 22651. The next prime is 22669. The reversal of 22668 is 86622.

It is a tau number, because it is divible by the number of its divisors (12).

It is a plaindrome in base 10 and base 16.

It is not an unprimeable number, because it can be changed into a prime (22669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 933 + ... + 956.

It is an arithmetic number, because the mean of its divisors is an integer number (4410).

2²²⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

22668 is an abundant number, since it is smaller than the sum of its proper divisors (30252).

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 (26460).

22668 is a wasteful number, since it uses less digits than its factorization.

22668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896 (or 1894 counting only the distinct ones).

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

The square root of 22668 is about 150.5589585511. The cubic root of 22668 is about 28.3011707324.

The spelling of 22668 in words is "twenty-two thousand, six hundred sixty-eight".