26697466891 has 2 divisors, whose sum is σ = 26697466892. Its totient is φ = 26697466890.

The previous prime is 26697466819. The next prime is 26697466909. The reversal of 26697466891 is 19866479662.

It is a happy number.

Together with previous prime (26697466819) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26697466891 is a prime.

It is not a weakly prime, because it can be changed into another prime (26697466801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13348733445 + 13348733446.

It is an arithmetic number, because the mean of its divisors is an integer number (13348733446).

Almost surely, 2^26697466891 is an apocalyptic number.

26697466891 is a deficient number, since it is larger than the sum of its proper divisors (1).

26697466891 is an equidigital number, since it uses as much as digits as its factorization.

26697466891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47029248, while the sum is 64.

The spelling of 26697466891 in words is "twenty-six billion, six hundred ninety-seven million, four hundred sixty-six thousand, eight hundred ninety-one".