66734339653 has 2 divisors, whose sum is σ = 66734339654. Its totient is φ = 66734339652.

The previous prime is 66734339611. The next prime is 66734339699. The reversal of 66734339653 is 35693343766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46534255524 + 20200084129 = 215718^2 + 142127^2 .

It is a cyclic number.

It is not a de Polignac number, because 66734339653 - 2²⁹ = 66197468741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66734339594 and 66734339603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66734339153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33367169826 + 33367169827.

It is an arithmetic number, because the mean of its divisors is an integer number (33367169827).

Almost surely, 2^66734339653 is an apocalyptic number.

It is an amenable number.

66734339653 is a deficient number, since it is larger than the sum of its proper divisors (1).

66734339653 is an equidigital number, since it uses as much as digits as its factorization.

66734339653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22044960, while the sum is 55.

The spelling of 66734339653 in words is "sixty-six billion, seven hundred thirty-four million, three hundred thirty-nine thousand, six hundred fifty-three".