9666446437 has 2 divisors, whose sum is σ = 9666446438. Its totient is φ = 9666446436.

The previous prime is 9666446407. The next prime is 9666446459. The reversal of 9666446437 is 7346446669.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6882195681 + 2784250756 = 82959^2 + 52766^2 .

It is an emirp because it is prime and its reverse (7346446669) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9666446437 - 2²⁷ = 9532228709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9666446407) 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, 4833223218 + 4833223219.

It is an arithmetic number, because the mean of its divisors is an integer number (4833223219).

Almost surely, 2^9666446437 is an apocalyptic number.

It is an amenable number.

9666446437 is a deficient number, since it is larger than the sum of its proper divisors (1).

9666446437 is an equidigital number, since it uses as much as digits as its factorization.

9666446437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15676416, while the sum is 55.

The square root of 9666446437 is about 98318.0880458932. The cubic root of 9666446437 is about 2130.2093321417.

The spelling of 9666446437 in words is "nine billion, six hundred sixty-six million, four hundred forty-six thousand, four hundred thirty-seven".