206866 has 8 divisors (see below), whose sum is σ = 338544. Its totient is φ = 94020.

The previous prime is 206827. The next prime is 206879. The reversal of 206866 is 668602.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4680 + ... + 4723.

It is an arithmetic number, because the mean of its divisors is an integer number (42318).

2²⁰⁶⁸⁶⁶ is an apocalyptic number.

206866 is a deficient number, since it is larger than the sum of its proper divisors (131678).

206866 is a wasteful number, since it uses less digits than its factorization.

206866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9416.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 206866 is about 454.8252411641. The cubic root of 206866 is about 59.1420497562.

It can be divided in two parts, 20 and 6866, that added together give a palindrome (6886).

The spelling of 206866 in words is "two hundred six thousand, eight hundred sixty-six".