166

Math

is the integer between.

Math features

 * is an even number.
 * 166 is a composite number and a deficient number.
 * 166 is a semiprime, being the product of 2 prime numbers.

&frac12;

 * $1⁄2$ is half of, approximating 166.5&#x2030; to be $1⁄6$ (the actual value is 166$2⁄3$&#x2030;).