197166 has 16 divisors (see below), whose sum is σ = 417744. Its totient is φ = 61824.

The previous prime is 197161. The next prime is 197203. The reversal of 197166 is 661791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197161) by changing a digit.

197166 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 (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 865 + ... + 1068.

It is an arithmetic number, because the mean of its divisors is an integer number (26109).

2¹⁹⁷¹⁶⁶ is an apocalyptic number.

197166 is an abundant number, since it is smaller than the sum of its proper divisors (220578).

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

197166 is a wasteful number, since it uses less digits than its factorization.

197166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955.

The product of its digits is 2268, while the sum is 30.

The square root of 197166 is about 444.0337824986. The cubic root of 197166 is about 58.2028174968.

Subtracting from 197166 its sum of digits (30), we obtain a square (197136 = 444²).

It can be divided in two parts, 197 and 166, that added together give a palindrome (363).

The spelling of 197166 in words is "one hundred ninety-seven thousand, one hundred sixty-six".