491166 has 24 divisors (see below), whose sum is σ = 1146600. Its totient is φ = 151056.

The previous prime is 491159. The next prime is 491167. The reversal of 491166 is 661194.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491167) by changing a digit.

491166 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 11 ways as a sum of consecutive naturals, for example, 816 + ... + 1283.

It is an arithmetic number, because the mean of its divisors is an integer number (47775).

2⁴⁹¹¹⁶⁶ is an apocalyptic number.

491166 is an abundant number, since it is smaller than the sum of its proper divisors (655434).

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

491166 is a wasteful number, since it uses less digits than its factorization.

491166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120 (or 2117 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 491166 is about 700.8323622665. The cubic root of 491166 is about 78.8998356679.

The spelling of 491166 in words is "four hundred ninety-one thousand, one hundred sixty-six".