26566489 has 2 divisors, whose sum is σ = 26566490. Its totient is φ = 26566488.

The previous prime is 26566471. The next prime is 26566493. The reversal of 26566489 is 98466562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19184400 + 7382089 = 4380^2 + 2717^2 .

It is a cyclic number.

It is not a de Polignac number, because 26566489 - 2⁷ = 26566361 is a prime.

It is not a weakly prime, because it can be changed into another prime (26566429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13283244 + 13283245.

It is an arithmetic number, because the mean of its divisors is an integer number (13283245).

Almost surely, 2^26566489 is an apocalyptic number.

It is an amenable number.

26566489 is a deficient number, since it is larger than the sum of its proper divisors (1).

26566489 is an equidigital number, since it uses as much as digits as its factorization.

26566489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 46.

The square root of 26566489 is about 5154.2690073375. The cubic root of 26566489 is about 298.3857330913.

The spelling of 26566489 in words is "twenty-six million, five hundred sixty-six thousand, four hundred eighty-nine".