26051661 has 6 divisors (see below), whose sum is σ = 37630190. Its totient is φ = 17367768.

The previous prime is 26051659. The next prime is 26051671. The reversal of 26051661 is 16615062.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17015625 + 9036036 = 4125^2 + 3006^2 .

It is not a de Polignac number, because 26051661 - 2¹ = 26051659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26051651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1447306 + ... + 1447323.

Almost surely, 2^26051661 is an apocalyptic number.

It is an amenable number.

26051661 is a deficient number, since it is larger than the sum of its proper divisors (11578529).

26051661 is a wasteful number, since it uses less digits than its factorization.

26051661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2894635 (or 2894632 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 26051661 is about 5104.0827775419. The cubic root of 26051661 is about 296.4456892202.

The spelling of 26051661 in words is "twenty-six million, fifty-one thousand, six hundred sixty-one".