6664544297 has 2 divisors, whose sum is σ = 6664544298. Its totient is φ = 6664544296.

The previous prime is 6664544279. The next prime is 6664544429. The reversal of 6664544297 is 7924454666.

Together with previous prime (6664544279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6659212816 + 5331481 = 81604^2 + 2309^2 .

It is a cyclic number.

It is not a de Polignac number, because 6664544297 - 2⁶ = 6664544233 is a prime.

It is not a weakly prime, because it can be changed into another prime (6664564297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332272148 + 3332272149.

It is an arithmetic number, because the mean of its divisors is an integer number (3332272149).

Almost surely, 2^6664544297 is an apocalyptic number.

It is an amenable number.

6664544297 is a deficient number, since it is larger than the sum of its proper divisors (1).

6664544297 is an equidigital number, since it uses as much as digits as its factorization.

6664544297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8709120, while the sum is 53.

The square root of 6664544297 is about 81636.6602513846. The cubic root of 6664544297 is about 1881.8723139318.

The spelling of 6664544297 in words is "six billion, six hundred sixty-four million, five hundred forty-four thousand, two hundred ninety-seven".