549166 has 4 divisors (see below), whose sum is σ = 823752. Its totient is φ = 274582.

The previous prime is 549163. The next prime is 549167. The reversal of 549166 is 661945.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137290 + ... + 137293.

It is an arithmetic number, because the mean of its divisors is an integer number (205938).

2⁵⁴⁹¹⁶⁶ is an apocalyptic number.

549166 is a deficient number, since it is larger than the sum of its proper divisors (274586).

549166 is a wasteful number, since it uses less digits than its factorization.

549166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274585.

The product of its digits is 6480, while the sum is 31.

The square root of 549166 is about 741.0573527063. The cubic root of 549166 is about 81.8906931440.

The spelling of 549166 in words is "five hundred forty-nine thousand, one hundred sixty-six".