266636743 has 2 divisors, whose sum is σ = 266636744. Its totient is φ = 266636742.

The previous prime is 266636663. The next prime is 266636749. The reversal of 266636743 is 347636662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266636743 - 2²¹ = 264539591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 266636743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266636749) by changing a digit.

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 as a sum of consecutive naturals, namely, 133318371 + 133318372.

It is an arithmetic number, because the mean of its divisors is an integer number (133318372).

Almost surely, 2^266636743 is an apocalyptic number.

266636743 is a deficient number, since it is larger than the sum of its proper divisors (1).

266636743 is an equidigital number, since it uses as much as digits as its factorization.

266636743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 43.

The square root of 266636743 is about 16329.0153714178. The cubic root of 266636743 is about 643.6355130177.

The spelling of 266636743 in words is "two hundred sixty-six million, six hundred thirty-six thousand, seven hundred forty-three".