28266756677 has 2 divisors, whose sum is σ = 28266756678. Its totient is φ = 28266756676.

The previous prime is 28266756631. The next prime is 28266756709. The reversal of 28266756677 is 77665766282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25143176356 + 3123580321 = 158566^2 + 55889^2 .

It is a cyclic number.

It is not a de Polignac number, because 28266756677 - 2²⁶ = 28199647813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28266756277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14133378338 + 14133378339.

It is an arithmetic number, because the mean of its divisors is an integer number (14133378339).

Almost surely, 2^28266756677 is an apocalyptic number.

It is an amenable number.

28266756677 is a deficient number, since it is larger than the sum of its proper divisors (1).

28266756677 is an equidigital number, since it uses as much as digits as its factorization.

28266756677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71124480, while the sum is 62.

The spelling of 28266756677 in words is "twenty-eight billion, two hundred sixty-six million, seven hundred fifty-six thousand, six hundred seventy-seven".