166222 has 16 divisors (see below), whose sum is σ = 294912. Its totient is φ = 68760.

The previous prime is 166219. The next prime is 166237. The reversal of 166222 is 222661.

166222 is a modest number, since divided by 222 gives 166 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 166222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243 + ... + 625.

It is an arithmetic number, because the mean of its divisors is an integer number (18432).

2¹⁶⁶²²² is an apocalyptic number.

166222 is a deficient number, since it is larger than the sum of its proper divisors (128690).

166222 is a wasteful number, since it uses less digits than its factorization.

166222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423.

The product of its digits is 288, while the sum is 19.

The square root of 166222 is about 407.7033235087. The cubic root of 166222 is about 54.9831353252.

Adding to 166222 its reverse (222661), we get a palindrome (388883).

The spelling of 166222 in words is "one hundred sixty-six thousand, two hundred twenty-two".