91866 has 16 divisors (see below), whose sum is σ = 187488. Its totient is φ = 30000.

The previous prime is 91841. The next prime is 91867. The reversal of 91866 is 66819.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (91867) 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, 241 + ... + 491.

It is an arithmetic number, because the mean of its divisors is an integer number (11718).

2⁹¹⁸⁶⁶ is an apocalyptic number.

91866 is an abundant number, since it is smaller than the sum of its proper divisors (95622).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93744).

91866 is a wasteful number, since it uses less digits than its factorization.

91866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317.

The product of its digits is 2592, while the sum is 30.

The square root of 91866 is about 303.0940448112. The cubic root of 91866 is about 45.1216461725.

The spelling of 91866 in words is "ninety-one thousand, eight hundred sixty-six".