22660 has 24 divisors (see below), whose sum is σ = 52416. Its totient is φ = 8160.

The previous prime is 22651. The next prime is 22669. The reversal of 22660 is 6622.

It is an interprime number because it is at equal distance from previous prime (22651) and next prime (22669).

It is a plaindrome in base 12 and base 15.

It is a nialpdrome in base 13.

It is a zygodrome in base 12.

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

22660 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169 + ... + 271.

It is an arithmetic number, because the mean of its divisors is an integer number (2184).

2²²⁶⁶⁰ is an apocalyptic number.

22660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26208).

22660 is an abundant number, since it is smaller than the sum of its proper divisors (29756).

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

22660 is a wasteful number, since it uses less digits than its factorization.

22660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 22660 is about 150.5323885415. The cubic root of 22660 is about 28.2978409870.

It can be divided in two parts, 2 and 2660, that added together give a palindrome (2662).

The spelling of 22660 in words is "twenty-two thousand, six hundred sixty".