26081661 has 16 divisors (see below), whose sum is σ = 36771840. Its totient is φ = 16398000.

The previous prime is 26081639. The next prime is 26081677. The reversal of 26081661 is 16618062.

It is not a de Polignac number, because 26081661 - 2¹³ = 26073469 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26081611) 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 in 15 ways as a sum of consecutive naturals, for example, 13396 + ... + 15218.

It is an arithmetic number, because the mean of its divisors is an integer number (2298240).

Almost surely, 2^26081661 is an apocalyptic number.

It is an amenable number.

26081661 is a deficient number, since it is larger than the sum of its proper divisors (10690179).

26081661 is a wasteful number, since it uses less digits than its factorization.

26081661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 26081661 is about 5107.0207557832. The cubic root of 26081661 is about 296.5594370424.

The spelling of 26081661 in words is "twenty-six million, eighty-one thousand, six hundred sixty-one".