9966503 has 2 divisors, whose sum is σ = 9966504. Its totient is φ = 9966502.

The previous prime is 9966499. The next prime is 9966511. The reversal of 9966503 is 3056699.

It is a weak prime.

It is an emirp because it is prime and its reverse (3056699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9966503 - 2² = 9966499 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9966533) 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, 4983251 + 4983252.

It is an arithmetic number, because the mean of its divisors is an integer number (4983252).

Almost surely, 2^9966503 is an apocalyptic number.

9966503 is a deficient number, since it is larger than the sum of its proper divisors (1).

9966503 is an equidigital number, since it uses as much as digits as its factorization.

9966503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 9966503 is about 3156.9768766971. The cubic root of 9966503 is about 215.2026429083.

The spelling of 9966503 in words is "nine million, nine hundred sixty-six thousand, five hundred three".