266676791 has 2 divisors, whose sum is σ = 266676792. Its totient is φ = 266676790.

The previous prime is 266676769. The next prime is 266676827. The reversal of 266676791 is 197676662.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266676791 is a prime.

It is a super-2 number, since 2×266676791² = 142233021716115362, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266676701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133338395 + 133338396.

It is an arithmetic number, because the mean of its divisors is an integer number (133338396).

Almost surely, 2^266676791 is an apocalyptic number.

266676791 is a deficient number, since it is larger than the sum of its proper divisors (1).

266676791 is an equidigital number, since it uses as much as digits as its factorization.

266676791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 50.

The square root of 266676791 is about 16330.2416087454. The cubic root of 266676791 is about 643.6677354143.

The spelling of 266676791 in words is "two hundred sixty-six million, six hundred seventy-six thousand, seven hundred ninety-one".