28666366682141 has 2 divisors, whose sum is σ = 28666366682142. Its totient is φ = 28666366682140.

The previous prime is 28666366682069. The next prime is 28666366682171. The reversal of 28666366682141 is 14128666366682.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26322953748100 + 2343412934041 = 5130590^2 + 1530821^2 .

It is a cyclic number.

It is not a de Polignac number, because 28666366682141 - 2²⁶ = 28666299573277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28666366682171) 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 as a sum of consecutive naturals, namely, 14333183341070 + 14333183341071.

It is an arithmetic number, because the mean of its divisors is an integer number (14333183341071).

Almost surely, 2^{28666366682141} is an apocalyptic number.

It is an amenable number.

28666366682141 is a deficient number, since it is larger than the sum of its proper divisors (1).

28666366682141 is an equidigital number, since it uses as much as digits as its factorization.

28666366682141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 143327232, while the sum is 65.

The spelling of 28666366682141 in words is "twenty-eight trillion, six hundred sixty-six billion, three hundred sixty-six million, six hundred eighty-two thousand, one hundred forty-one".