28666366682111 has 16 divisors (see below), whose sum is σ = 29078118609408. Its totient is φ = 28257559044000.

The previous prime is 28666366682069. The next prime is 28666366682141. The reversal of 28666366682111 is 11128666366682.

It is a cyclic number.

It is not a de Polignac number, because 28666366682111 - 2¹⁸ = 28666366419967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28666366682141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 521340326 + ... + 521395308.

It is an arithmetic number, because the mean of its divisors is an integer number (1817382413088).

Almost surely, 2^{28666366682111} is an apocalyptic number.

28666366682111 is a deficient number, since it is larger than the sum of its proper divisors (411751927297).

28666366682111 is a wasteful number, since it uses less digits than its factorization.

28666366682111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81622.

The product of its digits is 35831808, while the sum is 62.

The spelling of 28666366682111 in words is "twenty-eight trillion, six hundred sixty-six billion, three hundred sixty-six million, six hundred eighty-two thousand, one hundred eleven".