6444166163 has 2 divisors, whose sum is σ = 6444166164. Its totient is φ = 6444166162.

The previous prime is 6444166159. The next prime is 6444166171. The reversal of 6444166163 is 3616614446.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6444166163 - 2² = 6444166159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6444166163.

It is not a weakly prime, because it can be changed into another prime (6444166153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222083081 + 3222083082.

It is an arithmetic number, because the mean of its divisors is an integer number (3222083082).

Almost surely, 2^6444166163 is an apocalyptic number.

6444166163 is a deficient number, since it is larger than the sum of its proper divisors (1).

6444166163 is an equidigital number, since it uses as much as digits as its factorization.

6444166163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 41.

The square root of 6444166163 is about 80275.5639220305. The cubic root of 6444166163 is about 1860.8966042819.

The spelling of 6444166163 in words is "six billion, four hundred forty-four million, one hundred sixty-six thousand, one hundred sixty-three".