66648291163 has 2 divisors, whose sum is σ = 66648291164. Its totient is φ = 66648291162.

The previous prime is 66648291139. The next prime is 66648291191. The reversal of 66648291163 is 36119284666.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66648291163 - 2¹⁷ = 66648160091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66648291163.

It is not a weakly prime, because it can be changed into another prime (66648291133) 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, 33324145581 + 33324145582.

It is an arithmetic number, because the mean of its divisors is an integer number (33324145582).

Almost surely, 2^66648291163 is an apocalyptic number.

66648291163 is a deficient number, since it is larger than the sum of its proper divisors (1).

66648291163 is an equidigital number, since it uses as much as digits as its factorization.

66648291163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2239488, while the sum is 52.

The spelling of 66648291163 in words is "sixty-six billion, six hundred forty-eight million, two hundred ninety-one thousand, one hundred sixty-three".