266637061189 has 2 divisors, whose sum is σ = 266637061190. Its totient is φ = 266637061188.

The previous prime is 266637061147. The next prime is 266637061217. The reversal of 266637061189 is 981160736662.

266637061189 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., 136413512964 + 130223548225 = 369342^2 + 360865^2 .

It is a cyclic number.

It is not a de Polignac number, because 266637061189 - 2¹⁵ = 266637028421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266637061139) 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, 133318530594 + 133318530595.

It is an arithmetic number, because the mean of its divisors is an integer number (133318530595).

Almost surely, 2^266637061189 is an apocalyptic number.

It is an amenable number.

266637061189 is a deficient number, since it is larger than the sum of its proper divisors (1).

266637061189 is an equidigital number, since it uses as much as digits as its factorization.

266637061189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 266637061189 in words is "two hundred sixty-six billion, six hundred thirty-seven million, sixty-one thousand, one hundred eighty-nine".