28666366682171 has 2 divisors, whose sum is σ = 28666366682172. Its totient is φ = 28666366682170.

The previous prime is 28666366682141. The next prime is 28666366682207. The reversal of 28666366682171 is 17128666366682.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28666366682171 is a prime.

It is not a weakly prime, because it can be changed into another prime (28666366682141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14333183341085 + 14333183341086.

It is an arithmetic number, because the mean of its divisors is an integer number (14333183341086).

Almost surely, 2^{28666366682171} is an apocalyptic number.

28666366682171 is a deficient number, since it is larger than the sum of its proper divisors (1).

28666366682171 is an equidigital number, since it uses as much as digits as its factorization.

28666366682171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 250822656, while the sum is 68.

The spelling of 28666366682171 in words is "twenty-eight trillion, six hundred sixty-six billion, three hundred sixty-six million, six hundred eighty-two thousand, one hundred seventy-one".