2205666689 has 2 divisors, whose sum is σ = 2205666690. Its totient is φ = 2205666688.

The previous prime is 2205666667. The next prime is 2205666691. The reversal of 2205666689 is 9866665022.

2205666689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1998537025 + 207129664 = 44705^2 + 14392^2 .

It is a cyclic number.

It is not a de Polignac number, because 2205666689 - 2¹² = 2205662593 is a prime.

Together with 2205666691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2205662689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1102833344 + 1102833345.

It is an arithmetic number, because the mean of its divisors is an integer number (1102833345).

Almost surely, 2^2205666689 is an apocalyptic number.

It is an amenable number.

2205666689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2205666689 is an equidigital number, since it uses as much as digits as its factorization.

2205666689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The square root of 2205666689 is about 46964.5258572894. The cubic root of 2205666689 is about 1301.7071632819.

The spelling of 2205666689 in words is "two billion, two hundred five million, six hundred sixty-six thousand, six hundred eighty-nine".