266782223447 has 2 divisors, whose sum is σ = 266782223448. Its totient is φ = 266782223446.

The previous prime is 266782223443. The next prime is 266782223489. The reversal of 266782223447 is 744322287662.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266782223447 - 2² = 266782223443 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266782223443) 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, 133391111723 + 133391111724.

It is an arithmetic number, because the mean of its divisors is an integer number (133391111724).

Almost surely, 2^266782223447 is an apocalyptic number.

266782223447 is a deficient number, since it is larger than the sum of its proper divisors (1).

266782223447 is an equidigital number, since it uses as much as digits as its factorization.

266782223447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10838016, while the sum is 53.

The spelling of 266782223447 in words is "two hundred sixty-six billion, seven hundred eighty-two million, two hundred twenty-three thousand, four hundred forty-seven".