26456669 has 2 divisors, whose sum is σ = 26456670. Its totient is φ = 26456668.

The previous prime is 26456597. The next prime is 26456687. The reversal of 26456669 is 96665462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26112100 + 344569 = 5110^2 + 587^2 .

It is a cyclic number.

It is not a de Polignac number, because 26456669 - 2⁸ = 26456413 is a prime.

It is a super-2 number, since 2×26456669² = 1399910669151122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26456869) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13228334 + 13228335.

It is an arithmetic number, because the mean of its divisors is an integer number (13228335).

Almost surely, 2^26456669 is an apocalyptic number.

It is an amenable number.

26456669 is a deficient number, since it is larger than the sum of its proper divisors (1).

26456669 is an equidigital number, since it uses as much as digits as its factorization.

26456669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 44.

The square root of 26456669 is about 5143.6046698789. The cubic root of 26456669 is about 297.9740116670.

The spelling of 26456669 in words is "twenty-six million, four hundred fifty-six thousand, six hundred sixty-nine".