66848624197 has 2 divisors, whose sum is σ = 66848624198. Its totient is φ = 66848624196.

The previous prime is 66848624149. The next prime is 66848624203. The reversal of 66848624197 is 79142684866.

66848624197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62260729441 + 4587894756 = 249521^2 + 67734^2 .

It is a cyclic number.

It is not a de Polignac number, because 66848624197 - 2¹¹ = 66848622149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66848621197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33424312098 + 33424312099.

It is an arithmetic number, because the mean of its divisors is an integer number (33424312099).

Almost surely, 2^66848624197 is an apocalyptic number.

It is an amenable number.

66848624197 is a deficient number, since it is larger than the sum of its proper divisors (1).

66848624197 is an equidigital number, since it uses as much as digits as its factorization.

66848624197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27869184, while the sum is 61.

The spelling of 66848624197 in words is "sixty-six billion, eight hundred forty-eight million, six hundred twenty-four thousand, one hundred ninety-seven".