28666766694 has 16 divisors (see below), whose sum is σ = 57337067520. Its totient is φ = 9554999880.

The previous prime is 28666766683. The next prime is 28666766731. The reversal of 28666766694 is 49666766682.

It is a congruent number.

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, 35254 + ... + 242025.

It is an arithmetic number, because the mean of its divisors is an integer number (3583566720).

Almost surely, 2^28666766694 is an apocalyptic number.

28666766694 is an abundant number, since it is smaller than the sum of its proper divisors (28670300826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28666766694 is a wasteful number, since it uses less digits than its factorization.

28666766694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294515.

The product of its digits is 188116992, while the sum is 66.

The spelling of 28666766694 in words is "twenty-eight billion, six hundred sixty-six million, seven hundred sixty-six thousand, six hundred ninety-four".