43666676767979 has 2 divisors, whose sum is σ = 43666676767980. Its totient is φ = 43666676767978.

The previous prime is 43666676767957. The next prime is 43666676768017. The reversal of 43666676767979 is 97976767666634.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43666676767979 - 2¹⁶ = 43666676702443 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 43666676767894 and 43666676767903.

It is not a weakly prime, because it can be changed into another prime (43666676767949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21833338383989 + 21833338383990.

It is an arithmetic number, because the mean of its divisors is an integer number (21833338383990).

Almost surely, 2^{43666676767979} is an apocalyptic number.

43666676767979 is a deficient number, since it is larger than the sum of its proper divisors (1).

43666676767979 is an equidigital number, since it uses as much as digits as its factorization.

43666676767979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108884466432, while the sum is 89.

The spelling of 43666676767979 in words is "forty-three trillion, six hundred sixty-six billion, six hundred seventy-six million, seven hundred sixty-seven thousand, nine hundred seventy-nine".