26566338728 has 8 divisors (see below), whose sum is σ = 49811885130. Its totient is φ = 13283169360.

The previous prime is 26566338713. The next prime is 26566338767. The reversal of 26566338728 is 82783366562.

It can be written as a sum of positive squares in only one way, i.e., 25701861124 + 864477604 = 160318^2 + 29402^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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, 1660396163 + ... + 1660396178.

Almost surely, 2^26566338728 is an apocalyptic number.

It is an amenable number.

26566338728 is a deficient number, since it is larger than the sum of its proper divisors (23245546402).

26566338728 is a wasteful number, since it uses less digits than its factorization.

26566338728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3320792347 (or 3320792343 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 56.

The spelling of 26566338728 in words is "twenty-six billion, five hundred sixty-six million, three hundred thirty-eight thousand, seven hundred twenty-eight".