28666366682139 has 24 divisors (see below), whose sum is σ = 41936645277072. Its totient is φ = 18866785873920.

The previous prime is 28666366682069. The next prime is 28666366682141. The reversal of 28666366682139 is 93128666366682.

It is not a de Polignac number, because 28666366682139 - 2¹² = 28666366678043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28666366684139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13081542 + ... + 15114875.

It is an arithmetic number, because the mean of its divisors is an integer number (1747360219878).

Almost surely, 2^{28666366682139} is an apocalyptic number.

28666366682139 is a deficient number, since it is larger than the sum of its proper divisors (13270278594933).

28666366682139 is a wasteful number, since it uses less digits than its factorization.

28666366682139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28197867 (or 28197864 counting only the distinct ones).

The product of its digits is 967458816, while the sum is 72.

The spelling of 28666366682139 in words is "twenty-eight trillion, six hundred sixty-six billion, three hundred sixty-six million, six hundred eighty-two thousand, one hundred thirty-nine".