66930173759 has 2 divisors, whose sum is σ = 66930173760. Its totient is φ = 66930173758.

The previous prime is 66930173749. The next prime is 66930173897. The reversal of 66930173759 is 95737103966.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66930173759 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66930173749) 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, 33465086879 + 33465086880.

It is an arithmetic number, because the mean of its divisors is an integer number (33465086880).

Almost surely, 2^66930173759 is an apocalyptic number.

66930173759 is a deficient number, since it is larger than the sum of its proper divisors (1).

66930173759 is an equidigital number, since it uses as much as digits as its factorization.

66930173759 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6429780, while the sum is 56.

The spelling of 66930173759 in words is "sixty-six billion, nine hundred thirty million, one hundred seventy-three thousand, seven hundred fifty-nine".