6466044062221 has 2 divisors, whose sum is σ = 6466044062222. Its totient is φ = 6466044062220.

The previous prime is 6466044062209. The next prime is 6466044062227. The reversal of 6466044062221 is 1222604406646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4260566604996 + 2205477457225 = 2064114^2 + 1485085^2 .

It is a cyclic number.

It is not a de Polignac number, because 6466044062221 - 2¹¹ = 6466044060173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6466044062227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3233022031110 + 3233022031111.

It is an arithmetic number, because the mean of its divisors is an integer number (3233022031111).

Almost surely, 2^{6466044062221} is an apocalyptic number.

It is an amenable number.

6466044062221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6466044062221 is an equidigital number, since it uses as much as digits as its factorization.

6466044062221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 663552, while the sum is 43.

Adding to 6466044062221 its reverse (1222604406646), we get a palindrome (7688648468867).

The spelling of 6466044062221 in words is "six trillion, four hundred sixty-six billion, forty-four million, sixty-two thousand, two hundred twenty-one".