266972649589 has 2 divisors, whose sum is σ = 266972649590. Its totient is φ = 266972649588.

The previous prime is 266972649571. The next prime is 266972649611. The reversal of 266972649589 is 985946279662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185429278225 + 81543371364 = 430615^2 + 285558^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266972649589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266972649529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133486324794 + 133486324795.

It is an arithmetic number, because the mean of its divisors is an integer number (133486324795).

Almost surely, 2^266972649589 is an apocalyptic number.

It is an amenable number.

266972649589 is a deficient number, since it is larger than the sum of its proper divisors (1).

266972649589 is an equidigital number, since it uses as much as digits as its factorization.

266972649589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 705438720, while the sum is 73.

The spelling of 266972649589 in words is "two hundred sixty-six billion, nine hundred seventy-two million, six hundred forty-nine thousand, five hundred eighty-nine".