266946946936309 has 2 divisors, whose sum is σ = 266946946936310. Its totient is φ = 266946946936308.

The previous prime is 266946946936207. The next prime is 266946946936427. The reversal of 266946946936309 is 903639649649662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216761723208900 + 50185223727409 = 14722830^2 + 7084153^2 .

It is a cyclic number.

It is not a de Polignac number, because 266946946936309 - 2¹⁹ = 266946946412021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266946946936909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133473473468154 + 133473473468155.

It is an arithmetic number, because the mean of its divisors is an integer number (133473473468155).

Almost surely, 2^{266946946936309} is an apocalyptic number.

It is an amenable number.

266946946936309 is a deficient number, since it is larger than the sum of its proper divisors (1).

266946946936309 is an equidigital number, since it uses as much as digits as its factorization.

266946946936309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14693280768, while the sum is 82.

The spelling of 266946946936309 in words is "two hundred sixty-six trillion, nine hundred forty-six billion, nine hundred forty-six million, nine hundred thirty-six thousand, three hundred nine".