43666676771009 has 2 divisors, whose sum is σ = 43666676771010. Its totient is φ = 43666676771008.

The previous prime is 43666676770999. The next prime is 43666676771033. The reversal of 43666676771009 is 90017767666634.

43666676771009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40688387775025 + 2978288995984 = 6378745^2 + 1725772^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43666676771009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43666676771009.

It is not a weakly prime, because it can be changed into another prime (43666676771309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21833338385504 + 21833338385505.

It is an arithmetic number, because the mean of its divisors is an integer number (21833338385505).

Almost surely, 2^{43666676771009} is an apocalyptic number.

It is an amenable number.

43666676771009 is a deficient number, since it is larger than the sum of its proper divisors (1).

43666676771009 is an equidigital number, since it uses as much as digits as its factorization.

43666676771009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288054144, while the sum is 68.

The spelling of 43666676771009 in words is "forty-three trillion, six hundred sixty-six billion, six hundred seventy-six million, seven hundred seventy-one thousand, nine".