8166 is a positive integer in the decimal system. It sits between 8165 and 8167, and its decimal digits are 8, 1, 6, and 6. Mathematical properties: 8166 is an even and composite number. Its prime factorization is 2 × 3 × 1361, so its divisors are 1, 2, 3, 6, 1361, 2722, 4083, and 8166. It is not a perfect square or a perfect cube. The sum of its digits is 21, giving a digital root of 3. In other bases, 8166 is represented as 1111111100110 in binary and as 0x1FE6 in hexadecimal.