26669191 has 2 divisors, whose sum is σ = 26669192. Its totient is φ = 26669190.

The previous prime is 26669189. The next prime is 26669219. The reversal of 26669191 is 19196662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26669191 - 2¹ = 26669189 is a prime.

It is a super-2 number, since 2×26669191² = 1422491497188962, which contains 22 as substring.

Together with 26669189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26669131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13334595 + 13334596.

It is an arithmetic number, because the mean of its divisors is an integer number (13334596).

Almost surely, 2^26669191 is an apocalyptic number.

26669191 is a deficient number, since it is larger than the sum of its proper divisors (1).

26669191 is an equidigital number, since it uses as much as digits as its factorization.

26669191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 40.

The square root of 26669191 is about 5164.2222066832. Note that the first 4 decimals coincide. The cubic root of 26669191 is about 298.7697432725.

The spelling of 26669191 in words is "twenty-six million, six hundred sixty-nine thousand, one hundred ninety-one".