66247414273 has 2 divisors, whose sum is σ = 66247414274. Its totient is φ = 66247414272.

The previous prime is 66247414229. The next prime is 66247414279. The reversal of 66247414273 is 37241474266.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53308806769 + 12938607504 = 230887^2 + 113748^2 .

It is a cyclic number.

It is not a de Polignac number, because 66247414273 - 2²¹ = 66245317121 is a prime.

It is not a weakly prime, because it can be changed into another prime (66247414279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33123707136 + 33123707137.

It is an arithmetic number, because the mean of its divisors is an integer number (33123707137).

Almost surely, 2^66247414273 is an apocalyptic number.

It is an amenable number.

66247414273 is a deficient number, since it is larger than the sum of its proper divisors (1).

66247414273 is an equidigital number, since it uses as much as digits as its factorization.

66247414273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 46.

The spelling of 66247414273 in words is "sixty-six billion, two hundred forty-seven million, four hundred fourteen thousand, two hundred seventy-three".