206669065 has 8 divisors (see below), whose sum is σ = 249087240. Its totient is φ = 164612352.

The previous prime is 206669063. The next prime is 206669081. The reversal of 206669065 is 560966602.

It can be written as a sum of positive squares in 4 ways, for example, as 34245904 + 172423161 = 5852^2 + 13131^2 .

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 206669065 - 2¹ = 206669063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206669063) 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, 89104 + ... + 91393.

It is an arithmetic number, because the mean of its divisors is an integer number (31135905).

Almost surely, 2^206669065 is an apocalyptic number.

It is an amenable number.

206669065 is a deficient number, since it is larger than the sum of its proper divisors (42418175).

206669065 is a wasteful number, since it uses less digits than its factorization.

206669065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180731.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 206669065 is about 14375.9891833571. The cubic root of 206669065 is about 591.2327619019.

The spelling of 206669065 in words is "two hundred six million, six hundred sixty-nine thousand, sixty-five".