206659 has 4 divisors (see below), whose sum is σ = 211104. Its totient is φ = 202216.

The previous prime is 206651. The next prime is 206699. The reversal of 206659 is 956602.

206659 is nontrivially palindromic in base 14.

206659 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 206659 - 2³ = 206651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2152 + ... + 2245.

It is an arithmetic number, because the mean of its divisors is an integer number (52776).

2²⁰⁶⁶⁵⁹ is an apocalyptic number.

206659 is a deficient number, since it is larger than the sum of its proper divisors (4445).

206659 is an equidigital number, since it uses as much as digits as its factorization.

206659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4444.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 206659 is about 454.5976242789. The cubic root of 206659 is about 59.1223163861.

The spelling of 206659 in words is "two hundred six thousand, six hundred fifty-nine".