22666 has 8 divisors (see below), whose sum is σ = 38880. Its totient is φ = 9708.

The previous prime is 22651. The next prime is 22669. The reversal of 22666 is 66622.

It is a sphenic number, since it is the product of 3 distinct primes.

22666 is a modest number, since divided by 666 gives 22 as remainder.

It is a plaindrome in base 10, base 12 and base 16.

It is a zygodrome in base 10.

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, 796 + ... + 823.

It is an arithmetic number, because the mean of its divisors is an integer number (4860).

2²²⁶⁶⁶ is an apocalyptic number.

22666 is a deficient number, since it is larger than the sum of its proper divisors (16214).

22666 is a wasteful number, since it uses less digits than its factorization.

22666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628.

The product of its digits is 864, while the sum is 22.

The square root of 22666 is about 150.5523164883. The cubic root of 22666 is about 28.3003383695.

Subtracting 22666 from its reverse (66622), we obtain a triangular number (43956 = T₂₉₆).

It can be divided in two parts, 226 and 66, that added together give a palindrome (292).

The spelling of 22666 in words is "twenty-two thousand, six hundred sixty-six".