66763334389 has 2 divisors, whose sum is σ = 66763334390. Its totient is φ = 66763334388.

The previous prime is 66763334383. The next prime is 66763334437. The reversal of 66763334389 is 98343336766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66040262289 + 723072100 = 256983^2 + 26890^2 .

It is a cyclic number.

It is not a de Polignac number, because 66763334389 - 2¹¹ = 66763332341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66763334383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33381667194 + 33381667195.

It is an arithmetic number, because the mean of its divisors is an integer number (33381667195).

Almost surely, 2^66763334389 is an apocalyptic number.

It is an amenable number.

66763334389 is a deficient number, since it is larger than the sum of its proper divisors (1).

66763334389 is an equidigital number, since it uses as much as digits as its factorization.

66763334389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35271936, while the sum is 58.

The spelling of 66763334389 in words is "sixty-six billion, seven hundred sixty-three million, three hundred thirty-four thousand, three hundred eighty-nine".