866788524484469 has 2 divisors, whose sum is σ = 866788524484470. Its totient is φ = 866788524484468.

The previous prime is 866788524484411. The next prime is 866788524484511. The reversal of 866788524484469 is 964484425887668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 444979491244369 + 421809033240100 = 21094537^2 + 20537990^2 .

It is a cyclic number.

It is not a de Polignac number, because 866788524484469 - 2⁴⁸ = 585313547773813 is a prime.

It is a super-2 number, since 2×866788524484469² (a number of 31 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866788524484669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433394262242234 + 433394262242235.

It is an arithmetic number, because the mean of its divisors is an integer number (433394262242235).

Almost surely, 2^{866788524484469} is an apocalyptic number.

It is an amenable number.

866788524484469 is a deficient number, since it is larger than the sum of its proper divisors (1).

866788524484469 is an equidigital number, since it uses as much as digits as its factorization.

866788524484469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142690222080, while the sum is 89.

The spelling of 866788524484469 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred twenty-four million, four hundred eighty-four thousand, four hundred sixty-nine".