26656381 has 2 divisors, whose sum is σ = 26656382. Its totient is φ = 26656380.

The previous prime is 26656369. The next prime is 26656393. The reversal of 26656381 is 18365662.

It is a balanced prime because it is at equal distance from previous prime (26656369) and next prime (26656393).

It can be written as a sum of positive squares in only one way, i.e., 19660356 + 6996025 = 4434^2 + 2645^2 .

It is a cyclic number.

It is not a de Polignac number, because 26656381 - 2¹⁷ = 26525309 is a prime.

It is a super-2 number, since 2×26656381² = 1421125296034322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26656381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26656781) 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, 13328190 + 13328191.

It is an arithmetic number, because the mean of its divisors is an integer number (13328191).

Almost surely, 2^26656381 is an apocalyptic number.

It is an amenable number.

26656381 is a deficient number, since it is larger than the sum of its proper divisors (1).

26656381 is an equidigital number, since it uses as much as digits as its factorization.

26656381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 26656381 is about 5162.9817934988. The cubic root of 26656381 is about 298.7218996346.

The spelling of 26656381 in words is "twenty-six million, six hundred fifty-six thousand, three hundred eighty-one".