266043540525247 has 2 divisors, whose sum is σ = 266043540525248. Its totient is φ = 266043540525246.

The previous prime is 266043540525241. The next prime is 266043540525289. The reversal of 266043540525247 is 742525045340662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266043540525247 - 2³⁹ = 265493784711359 is a prime.

It is a super-2 number, since 2×266043540525247² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266043540525241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133021770262623 + 133021770262624.

It is an arithmetic number, because the mean of its divisors is an integer number (133021770262624).

Almost surely, 2^{266043540525247} is an apocalyptic number.

266043540525247 is a deficient number, since it is larger than the sum of its proper divisors (1).

266043540525247 is an equidigital number, since it uses as much as digits as its factorization.

266043540525247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384000, while the sum is 55.

The spelling of 266043540525247 in words is "two hundred sixty-six trillion, forty-three billion, five hundred forty million, five hundred twenty-five thousand, two hundred forty-seven".