266041240645633 has 2 divisors, whose sum is σ = 266041240645634. Its totient is φ = 266041240645632.

The previous prime is 266041240645589. The next prime is 266041240645639. The reversal of 266041240645633 is 336546042140662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244876898022849 + 21164342622784 = 15648543^2 + 4600472^2 .

It is a cyclic number.

It is not a de Polignac number, because 266041240645633 - 2⁹ = 266041240645121 is a prime.

It is a super-4 number, since 4×266041240645633⁴ (a number of 59 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (266041240645639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133020620322816 + 133020620322817.

It is an arithmetic number, because the mean of its divisors is an integer number (133020620322817).

Almost surely, 2^{266041240645633} is an apocalyptic number.

It is an amenable number.

266041240645633 is a deficient number, since it is larger than the sum of its proper divisors (1).

266041240645633 is an equidigital number, since it uses as much as digits as its factorization.

266041240645633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14929920, while the sum is 52.

The spelling of 266041240645633 in words is "two hundred sixty-six trillion, forty-one billion, two hundred forty million, six hundred forty-five thousand, six hundred thirty-three".