166500222 has 64 divisors (see below), whose sum is σ = 393254400. Its totient is φ = 46002816.

The previous prime is 166500203. The next prime is 166500253. The reversal of 166500222 is 222005661.

It is a junction number, because it is equal to n+sod(n) for n = 166500192 and 166500201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 476904 + ... + 477252.

It is an arithmetic number, because the mean of its divisors is an integer number (6144600).

Almost surely, 2^166500222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166500222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196627200).

166500222 is an abundant number, since it is smaller than the sum of its proper divisors (226754178).

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

166500222 is a wasteful number, since it uses less digits than its factorization.

166500222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 166500222 is about 12903.4965028863. The cubic root of 166500222 is about 550.1379510711.

Adding to 166500222 its reverse (222005661), we get a palindrome (388505883).

The spelling of 166500222 in words is "one hundred sixty-six million, five hundred thousand, two hundred twenty-two".