158166 has 32 divisors (see below), whose sum is σ = 367200. Its totient is φ = 50400.

The previous prime is 158161. The next prime is 158189. The reversal of 158166 is 661851.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158161) by changing a digit.

158166 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1516 + ... + 1616.

It is an arithmetic number, because the mean of its divisors is an integer number (11475).

2¹⁵⁸¹⁶⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183600).

158166 is an abundant number, since it is smaller than the sum of its proper divisors (209034).

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

158166 is a wasteful number, since it uses less digits than its factorization.

158166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 135 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 158166 is about 397.7008926316. The cubic root of 158166 is about 54.0801279568.

It can be divided in two parts, 158 and 166, that added together give a square (324 = 18²).

The spelling of 158166 in words is "one hundred fifty-eight thousand, one hundred sixty-six".