266552550289 has 2 divisors, whose sum is σ = 266552550290. Its totient is φ = 266552550288.

The previous prime is 266552550287. The next prime is 266552550293. The reversal of 266552550289 is 982055255662.

It is a happy number.

266552550289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179301433600 + 87251116689 = 423440^2 + 295383^2 .

It is a cyclic number.

It is not a de Polignac number, because 266552550289 - 2¹ = 266552550287 is a prime.

Together with 266552550287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (266552550281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133276275144 + 133276275145.

It is an arithmetic number, because the mean of its divisors is an integer number (133276275145).

Almost surely, 2^266552550289 is an apocalyptic number.

It is an amenable number.

266552550289 is a deficient number, since it is larger than the sum of its proper divisors (1).

266552550289 is an equidigital number, since it uses as much as digits as its factorization.

266552550289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960000, while the sum is 55.

The spelling of 266552550289 in words is "two hundred sixty-six billion, five hundred fifty-two million, five hundred fifty thousand, two hundred eighty-nine".