26166768091 has 2 divisors, whose sum is σ = 26166768092. Its totient is φ = 26166768090.

The previous prime is 26166768073. The next prime is 26166768097. The reversal of 26166768091 is 19086766162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26166768091 - 2¹⁵ = 26166735323 is a prime.

It is not a weakly prime, because it can be changed into another prime (26166768097) 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, 13083384045 + 13083384046.

It is an arithmetic number, because the mean of its divisors is an integer number (13083384046).

Almost surely, 2^26166768091 is an apocalyptic number.

26166768091 is a deficient number, since it is larger than the sum of its proper divisors (1).

26166768091 is an equidigital number, since it uses as much as digits as its factorization.

26166768091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 26166768091 in words is "twenty-six billion, one hundred sixty-six million, seven hundred sixty-eight thousand, ninety-one".