26640827 has 2 divisors, whose sum is σ = 26640828. Its totient is φ = 26640826.

The previous prime is 26640791. The next prime is 26640829. The reversal of 26640827 is 72804662.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26640827 is a prime.

Together with 26640829, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26640829) 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, 13320413 + 13320414.

It is an arithmetic number, because the mean of its divisors is an integer number (13320414).

Almost surely, 2^26640827 is an apocalyptic number.

26640827 is a deficient number, since it is larger than the sum of its proper divisors (1).

26640827 is an equidigital number, since it uses as much as digits as its factorization.

26640827 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 26640827 is about 5161.4752736015. The cubic root of 26640827 is about 298.6637869144.

The spelling of 26640827 in words is "twenty-six million, six hundred forty thousand, eight hundred twenty-seven".