9966937 has 2 divisors, whose sum is σ = 9966938. Its totient is φ = 9966936.

The previous prime is 9966883. The next prime is 9966941. The reversal of 9966937 is 7396699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8128201 + 1838736 = 2851^2 + 1356^2 .

It is an emirp because it is prime and its reverse (7396699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9966937 - 2¹⁹ = 9442649 is a prime.

It is not a weakly prime, because it can be changed into another prime (9966967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4983468 + 4983469.

It is an arithmetic number, because the mean of its divisors is an integer number (4983469).

Almost surely, 2^9966937 is an apocalyptic number.

It is an amenable number.

9966937 is a deficient number, since it is larger than the sum of its proper divisors (1).

9966937 is an equidigital number, since it uses as much as digits as its factorization.

9966937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 551124, while the sum is 49.

The square root of 9966937 is about 3157.0456125942. The cubic root of 9966937 is about 215.2057665914.

The spelling of 9966937 in words is "nine million, nine hundred sixty-six thousand, nine hundred thirty-seven".