26066861 has 2 divisors, whose sum is σ = 26066862. Its totient is φ = 26066860.

The previous prime is 26066851. The next prime is 26066881. The reversal of 26066861 is 16866062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25694761 + 372100 = 5069^2 + 610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26066861 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26066851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13033430 + 13033431.

It is an arithmetic number, because the mean of its divisors is an integer number (13033431).

Almost surely, 2^26066861 is an apocalyptic number.

It is an amenable number.

26066861 is a deficient number, since it is larger than the sum of its proper divisors (1).

26066861 is an equidigital number, since it uses as much as digits as its factorization.

26066861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 26066861 is about 5105.5715644774. The cubic root of 26066861 is about 296.5033323574.

The spelling of 26066861 in words is "twenty-six million, sixty-six thousand, eight hundred sixty-one".