66338685419 has 2 divisors, whose sum is σ = 66338685420. Its totient is φ = 66338685418.

The previous prime is 66338685389. The next prime is 66338685431. The reversal of 66338685419 is 91458683366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66338685419 - 2⁸ = 66338685163 is a prime.

It is a super-2 number, since 2×66338685419² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66338687419) 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, 33169342709 + 33169342710.

It is an arithmetic number, because the mean of its divisors is an integer number (33169342710).

Almost surely, 2^66338685419 is an apocalyptic number.

66338685419 is a deficient number, since it is larger than the sum of its proper divisors (1).

66338685419 is an equidigital number, since it uses as much as digits as its factorization.

66338685419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22394880, while the sum is 59.

The spelling of 66338685419 in words is "sixty-six billion, three hundred thirty-eight million, six hundred eighty-five thousand, four hundred nineteen".