866196 has 18 divisors (see below), whose sum is σ = 2189642. Its totient is φ = 288720.

The previous prime is 866183. The next prime is 866197. The reversal of 866196 is 691668.

It can be written as a sum of positive squares in only one way, i.e., 864900 + 1296 = 930^2 + 36^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 24061 = 866196 / (8 + 6 + 6 + 1 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 866196.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866197) by changing a digit.

866196 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 5 ways as a sum of consecutive naturals, for example, 11995 + ... + 12066.

2⁸⁶⁶¹⁹⁶ is an apocalyptic number.

It is an amenable number.

866196 is an abundant number, since it is smaller than the sum of its proper divisors (1323446).

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

866196 is a wasteful number, since it uses less digits than its factorization.

866196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24071 (or 24066 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 866196 is about 930.6965133705. The cubic root of 866196 is about 95.3246877365.

The spelling of 866196 in words is "eight hundred sixty-six thousand, one hundred ninety-six".