166163 has 4 divisors (see below), whose sum is σ = 168120. Its totient is φ = 164208.

The previous prime is 166157. The next prime is 166169. The reversal of 166163 is 361661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 361661 = 41 ⋅8821.

It is an interprime number because it is at equal distance from previous prime (166157) and next prime (166169).

It is a cyclic number.

It is not a de Polignac number, because 166163 - 2⁴ = 166147 is a prime.

It is a super-2 number, since 2×166163² = 55220285138, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (166169) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 845 + ... + 1022.

It is an arithmetic number, because the mean of its divisors is an integer number (42030).

2¹⁶⁶¹⁶³ is an apocalyptic number.

166163 is a deficient number, since it is larger than the sum of its proper divisors (1957).

166163 is an equidigital number, since it uses as much as digits as its factorization.

166163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956.

The product of its digits is 648, while the sum is 23.

The square root of 166163 is about 407.6309605513. The cubic root of 166163 is about 54.9766291890.

The spelling of 166163 in words is "one hundred sixty-six thousand, one hundred sixty-three".