204166 has 16 divisors (see below), whose sum is σ = 328320. Its totient is φ = 95040.

The previous prime is 204163. The next prime is 204173. The reversal of 204166 is 661402.

204166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2250 + ... + 2338.

It is an arithmetic number, because the mean of its divisors is an integer number (20520).

2²⁰⁴¹⁶⁶ is an apocalyptic number.

204166 is a deficient number, since it is larger than the sum of its proper divisors (124154).

204166 is a wasteful number, since it uses less digits than its factorization.

204166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 204166 is about 451.8473193458. The cubic root of 204166 is about 58.8836162097.

Adding to 204166 its reverse (661402), we get a palindrome (865568).

It can be divided in two parts, 20 and 4166, that added together give a triangular number (4186 = T₉₁).

The spelling of 204166 in words is "two hundred four thousand, one hundred sixty-six".