206668201 has 8 divisors (see below), whose sum is σ = 218954664. Its totient is φ = 194396160.

The previous prime is 206668193. The next prime is 206668211. The reversal of 206668201 is 102866602.

It can be written as a sum of positive squares in 4 ways, for example, as 151314601 + 55353600 = 12301^2 + 7440^2 .

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 206668201 - 2³ = 206668193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206668211) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 43881 + ... + 48361.

It is an arithmetic number, because the mean of its divisors is an integer number (27369333).

Almost surely, 2^206668201 is an apocalyptic number.

It is an amenable number.

206668201 is a deficient number, since it is larger than the sum of its proper divisors (12286463).

206668201 is a wasteful number, since it uses less digits than its factorization.

206668201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7211.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 206668201 is about 14375.9591332196. The cubic root of 206668201 is about 591.2319379989.

The spelling of 206668201 in words is "two hundred six million, six hundred sixty-eight thousand, two hundred one".