85866 has 16 divisors (see below), whose sum is σ = 187488.
Its totient is φ = 26000.
The previous prime is 85853. The next prime is 85889. The reversal of 85866 is 66858.
It is a Harshad number since it is a multiple of its sum of digits (33).
It is a fibodiv number, since the Fibonacci-like sequence with seeds 858 and 66 contains 85866 itself.
It is an Ulam number.
It is a Curzon number.
It is an unprimeable number.
85866 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 7 ways as a sum of consecutive naturals, for example, 585 + ... + 716.
It is an arithmetic number, because the mean of its divisors is an integer number (11718).
285866 is an apocalyptic number.
85866 is an abundant number, since it is smaller than the sum of its proper divisors (101622).
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).
85866 is a wasteful number, since it uses less digits than its factorization.
85866 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1317.
The product of its digits is 11520, while the sum is 33.
The square root of 85866 is about 293.0290088029.
The cubic root of 85866 is about 44.1171122550.
The spelling of 85866 in words is "eighty-five thousand, eight hundred sixty-six".