2205047665 has 4 divisors (see below), whose sum is σ = 2646057204. Its totient is φ = 1764038128.

The previous prime is 2205047659. The next prime is 2205047707. The reversal of 2205047665 is 5667405022.

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 1348431841 + 856615824 = 36721^2 + 29268^2 .

It is a cyclic number.

It is not a de Polignac number, because 2205047665 - 2³ = 2205047657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220504762 + ... + 220504771.

It is an arithmetic number, because the mean of its divisors is an integer number (661514301).

Almost surely, 2^2205047665 is an apocalyptic number.

It is an amenable number.

2205047665 is a deficient number, since it is larger than the sum of its proper divisors (441009539).

2205047665 is an equidigital number, since it uses as much as digits as its factorization.

2205047665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441009538.

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 2205047665 is about 46957.9350589440. The cubic root of 2205047665 is about 1301.5853764661.

The spelling of 2205047665 in words is "two billion, two hundred five million, forty-seven thousand, six hundred sixty-five".