206663 has 8 divisors (see below), whose sum is σ = 222000. Its totient is φ = 191808.

The previous prime is 206651. The next prime is 206699. The reversal of 206663 is 366602.

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

It is a cyclic number.

It is not a de Polignac number, because 206663 - 2⁸ = 206407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1313 + ... + 1461.

It is an arithmetic number, because the mean of its divisors is an integer number (27750).

2²⁰⁶⁶⁶³ is an apocalyptic number.

206663 is a deficient number, since it is larger than the sum of its proper divisors (15337).

206663 is a wasteful number, since it uses less digits than its factorization.

206663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 206663 is about 454.6020237526. The cubic root of 206663 is about 59.1226978321.

The spelling of 206663 in words is "two hundred six thousand, six hundred sixty-three".