66763335389 has 2 divisors, whose sum is σ = 66763335390. Its totient is φ = 66763335388.

The previous prime is 66763335361. The next prime is 66763335413. The reversal of 66763335389 is 98353336766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34743096025 + 32020239364 = 186395^2 + 178942^2 .

It is a cyclic number.

It is not a de Polignac number, because 66763335389 - 2²⁰ = 66762286813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66763335329) 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, 33381667694 + 33381667695.

It is an arithmetic number, because the mean of its divisors is an integer number (33381667695).

Almost surely, 2^66763335389 is an apocalyptic number.

It is an amenable number.

66763335389 is a deficient number, since it is larger than the sum of its proper divisors (1).

66763335389 is an equidigital number, since it uses as much as digits as its factorization.

66763335389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44089920, while the sum is 59.

The spelling of 66763335389 in words is "sixty-six billion, seven hundred sixty-three million, three hundred thirty-five thousand, three hundred eighty-nine".