28666366419967 has 2 divisors, whose sum is σ = 28666366419968. Its totient is φ = 28666366419966.

The previous prime is 28666366419871. The next prime is 28666366419983. The reversal of 28666366419967 is 76991466366682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28666366419967 - 2³⁹ = 28116610606079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28666366419167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14333183209983 + 14333183209984.

It is an arithmetic number, because the mean of its divisors is an integer number (14333183209984).

Almost surely, 2^{28666366419967} is an apocalyptic number.

28666366419967 is a deficient number, since it is larger than the sum of its proper divisors (1).

28666366419967 is an equidigital number, since it uses as much as digits as its factorization.

28666366419967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5079158784, while the sum is 79.

The spelling of 28666366419967 in words is "twenty-eight trillion, six hundred sixty-six billion, three hundred sixty-six million, four hundred nineteen thousand, nine hundred sixty-seven".