9966223 has 2 divisors, whose sum is σ = 9966224. Its totient is φ = 9966222.

The previous prime is 9966217. The next prime is 9966251. The reversal of 9966223 is 3226699.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9966223 - 2⁵ = 9966191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9966263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4983111 + 4983112.

It is an arithmetic number, because the mean of its divisors is an integer number (4983112).

Almost surely, 2^9966223 is an apocalyptic number.

9966223 is a deficient number, since it is larger than the sum of its proper divisors (1).

9966223 is an equidigital number, since it uses as much as digits as its factorization.

9966223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 37.

The square root of 9966223 is about 3156.9325301628. The cubic root of 9966223 is about 215.2006275807.

The spelling of 9966223 in words is "nine million, nine hundred sixty-six thousand, two hundred twenty-three".