109866 has 8 divisors (see below), whose sum is σ = 219744. Its totient is φ = 36620.

The previous prime is 109859. The next prime is 109873. The reversal of 109866 is 668901.

It is an interprime number because it is at equal distance from previous prime (109859) and next prime (109873).

It is a sphenic number, since it is the product of 3 distinct primes.

109866 is an admirable number.

It is an unprimeable number.

109866 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 3 ways as a sum of consecutive naturals, for example, 9150 + ... + 9161.

It is an arithmetic number, because the mean of its divisors is an integer number (27468).

2¹⁰⁹⁸⁶⁶ is an apocalyptic number.

109866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

109866 is a wasteful number, since it uses less digits than its factorization.

109866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18316.

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

The square root of 109866 is about 331.4604048752. The cubic root of 109866 is about 47.8947345964.

The spelling of 109866 in words is "one hundred nine thousand, eight hundred sixty-six".