26680891 has 2 divisors, whose sum is σ = 26680892. Its totient is φ = 26680890.

The previous prime is 26680861. The next prime is 26680919. The reversal of 26680891 is 19808662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26680891 - 2¹¹ = 26678843 is a prime.

It is not a weakly prime, because it can be changed into another prime (26680831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13340445 + 13340446.

It is an arithmetic number, because the mean of its divisors is an integer number (13340446).

Almost surely, 2^26680891 is an apocalyptic number.

26680891 is a deficient number, since it is larger than the sum of its proper divisors (1).

26680891 is an equidigital number, since it uses as much as digits as its factorization.

26680891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 26680891 is about 5165.3548764824. The cubic root of 26680891 is about 298.8134278239.

The spelling of 26680891 in words is "twenty-six million, six hundred eighty thousand, eight hundred ninety-one".