206668849 has 4 divisors (see below), whose sum is σ = 206702964. Its totient is φ = 206634736.

The previous prime is 206668843. The next prime is 206668873. The reversal of 206668849 is 948866602.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29778849 + 176890000 = 5457^2 + 13300^2 .

It is a cyclic number.

It is not a de Polignac number, because 206668849 - 2¹⁵ = 206636081 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206668843) 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, 5242 + ... + 20995.

It is an arithmetic number, because the mean of its divisors is an integer number (51675741).

Almost surely, 2^206668849 is an apocalyptic number.

It is an amenable number.

206668849 is a deficient number, since it is larger than the sum of its proper divisors (34115).

206668849 is an equidigital number, since it uses as much as digits as its factorization.

206668849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34114.

The product of its (nonzero) digits is 995328, while the sum is 49.

The square root of 206668849 is about 14375.9816708286. The cubic root of 206668849 is about 591.2325559264.

The spelling of 206668849 in words is "two hundred six million, six hundred sixty-eight thousand, eight hundred forty-nine".