22001166 has 32 divisors (see below), whose sum is σ = 53337600. Its totient is φ = 6666840.

The previous prime is 22001143. The next prime is 22001173. The reversal of 22001166 is 66110022.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17926 + ... + 19113.

It is an arithmetic number, because the mean of its divisors is an integer number (1666800).

Almost surely, 2^22001166 is an apocalyptic number.

22001166 is an abundant number, since it is smaller than the sum of its proper divisors (31336434).

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

22001166 is a wasteful number, since it uses less digits than its factorization.

22001166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37061 (or 37055 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 22001166 is about 4690.5400541942. The cubic root of 22001166 is about 280.2088832476.

Adding to 22001166 its reverse (66110022), we get a palindrome (88111188).

The spelling of 22001166 in words is "twenty-two million, one thousand, one hundred sixty-six".