185166 has 28 divisors (see below), whose sum is σ = 419712. Its totient is φ = 61236.

The previous prime is 185161. The next prime is 185167. The reversal of 185166 is 661581.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185161) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1395 + ... + 1521.

2¹⁸⁵¹⁶⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 185166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209856).

185166 is an abundant number, since it is smaller than the sum of its proper divisors (234546).

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

185166 is an equidigital number, since it uses as much as digits as its factorization.

185166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 132 counting only the distinct ones).

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

The square root of 185166 is about 430.3091911637. The cubic root of 185166 is about 56.9972297823.

Adding to 185166 its sum of digits (27), we get a cube (185193 = 57³).

It can be divided in two parts, 185 and 166, that added together give a triangular number (351 = T₂₆).

The spelling of 185166 in words is "one hundred eighty-five thousand, one hundred sixty-six".