66129843683 has 2 divisors, whose sum is σ = 66129843684. Its totient is φ = 66129843682.

The previous prime is 66129843667. The next prime is 66129843709. The reversal of 66129843683 is 38634892166.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66129843683 - 2⁴ = 66129843667 is a prime.

It is not a weakly prime, because it can be changed into another prime (66129843643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33064921841 + 33064921842.

It is an arithmetic number, because the mean of its divisors is an integer number (33064921842).

Almost surely, 2^66129843683 is an apocalyptic number.

66129843683 is a deficient number, since it is larger than the sum of its proper divisors (1).

66129843683 is an equidigital number, since it uses as much as digits as its factorization.

66129843683 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8957952, while the sum is 56.

The spelling of 66129843683 in words is "sixty-six billion, one hundred twenty-nine million, eight hundred forty-three thousand, six hundred eighty-three".