66728320301 has 2 divisors, whose sum is σ = 66728320302. Its totient is φ = 66728320300.

The previous prime is 66728320289. The next prime is 66728320313. The reversal of 66728320301 is 10302382766.

It is a balanced prime because it is at equal distance from previous prime (66728320289) and next prime (66728320313).

It can be written as a sum of positive squares in only one way, i.e., 51972144676 + 14756175625 = 227974^2 + 121475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66728320301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66728320331) 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, 33364160150 + 33364160151.

It is an arithmetic number, because the mean of its divisors is an integer number (33364160151).

Almost surely, 2^66728320301 is an apocalyptic number.

It is an amenable number.

66728320301 is a deficient number, since it is larger than the sum of its proper divisors (1).

66728320301 is an equidigital number, since it uses as much as digits as its factorization.

66728320301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 38.

The spelling of 66728320301 in words is "sixty-six billion, seven hundred twenty-eight million, three hundred twenty thousand, three hundred one".