26887289666 has 16 divisors (see below), whose sum is σ = 41327621280. Its totient is φ = 13114895040.

The previous prime is 26887289647. The next prime is 26887289687. The reversal of 26887289666 is 66698278862.

It is a junction number, because it is equal to n+sod(n) for n = 26887289596 and 26887289605.

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 in 7 ways as a sum of consecutive naturals, for example, 854231 + ... + 885146.

It is an arithmetic number, because the mean of its divisors is an integer number (2582976330).

Almost surely, 2^26887289666 is an apocalyptic number.

26887289666 is a deficient number, since it is larger than the sum of its proper divisors (14440331614).

26887289666 is a wasteful number, since it uses less digits than its factorization.

26887289666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739569.

The product of its digits is 167215104, while the sum is 68.

The spelling of 26887289666 in words is "twenty-six billion, eight hundred eighty-seven million, two hundred eighty-nine thousand, six hundred sixty-six".