26666641 has 4 divisors (see below), whose sum is σ = 26680500. Its totient is φ = 26652784.

The previous prime is 26666621. The next prime is 26666663. The reversal of 26666641 is 14666662.

26666641 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14666662 = 2 ⋅7333331.

It can be written as a sum of positive squares in 2 ways, for example, as 24295041 + 2371600 = 4929^2 + 1540^2 .

It is a cyclic number.

It is not a de Polignac number, because 26666641 - 2⁵ = 26666609 is a prime.

It is a super-2 number, since 2×26666641² = 1422219484445762, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26666641.

It is not an unprimeable number, because it can be changed into a prime (26666611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3466 + ... + 8083.

It is an arithmetic number, because the mean of its divisors is an integer number (6670125).

Almost surely, 2^26666641 is an apocalyptic number.

It is an amenable number.

26666641 is a deficient number, since it is larger than the sum of its proper divisors (13859).

26666641 is a wasteful number, since it uses less digits than its factorization.

26666641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13858.

The product of its digits is 62208, while the sum is 37.

The square root of 26666641 is about 5163.9753097783. The cubic root of 26666641 is about 298.7602205848.

The spelling of 26666641 in words is "twenty-six million, six hundred sixty-six thousand, six hundred forty-one".