866118 has 24 divisors (see below), whose sum is σ = 1905624. Its totient is φ = 262240.

The previous prime is 866101. The next prime is 866119. The reversal of 866118 is 811668.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 866118.

It is not an unprimeable number, because it can be changed into a prime (866119) by changing a digit.

866118 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130 + ... + 1322.

It is an arithmetic number, because the mean of its divisors is an integer number (79401).

2⁸⁶⁶¹¹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (952812).

866118 is an abundant number, since it is smaller than the sum of its proper divisors (1039506).

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

866118 is a wasteful number, since it uses less digits than its factorization.

866118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220 (or 1209 counting only the distinct ones).

The product of its digits is 2304, while the sum is 30.

The square root of 866118 is about 930.6546083268. The cubic root of 866118 is about 95.3218263560.

The spelling of 866118 in words is "eight hundred sixty-six thousand, one hundred eighteen".