166118 has 4 divisors (see below), whose sum is σ = 249180. Its totient is φ = 83058.

The previous prime is 166099. The next prime is 166147. The reversal of 166118 is 811661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 811661 = 19 ⋅42719.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 166093 and 166102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41528 + ... + 41531.

It is an arithmetic number, because the mean of its divisors is an integer number (62295).

2¹⁶⁶¹¹⁸ is an apocalyptic number.

166118 is a deficient number, since it is larger than the sum of its proper divisors (83062).

166118 is an equidigital number, since it uses as much as digits as its factorization.

166118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83061.

The product of its digits is 288, while the sum is 23.

The square root of 166118 is about 407.5757598288. The cubic root of 166118 is about 54.9716658465.

Adding to 166118 its reverse (811661), we get a palindrome (977779).

The spelling of 166118 in words is "one hundred sixty-six thousand, one hundred eighteen".