266828242697 has 2 divisors, whose sum is σ = 266828242698. Its totient is φ = 266828242696.

The previous prime is 266828242631. The next prime is 266828242741. The reversal of 266828242697 is 796242828662.

266828242697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149327372041 + 117500870656 = 386429^2 + 342784^2 .

It is a cyclic number.

It is not a de Polignac number, because 266828242697 - 2¹⁸ = 266827980553 is a prime.

It is a super-2 number, since 2×266828242697² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (266828242627) 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, 133414121348 + 133414121349.

It is an arithmetic number, because the mean of its divisors is an integer number (133414121349).

Almost surely, 2^266828242697 is an apocalyptic number.

It is an amenable number.

266828242697 is a deficient number, since it is larger than the sum of its proper divisors (1).

266828242697 is an equidigital number, since it uses as much as digits as its factorization.

266828242697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55738368, while the sum is 62.

The spelling of 266828242697 in words is "two hundred sixty-six billion, eight hundred twenty-eight million, two hundred forty-two thousand, six hundred ninety-seven".