9666623 has 2 divisors, whose sum is σ = 9666624. Its totient is φ = 9666622.

The previous prime is 9666589. The next prime is 9666661. The reversal of 9666623 is 3266669.

It is an a-pointer prime, because the next prime (9666661) can be obtained adding 9666623 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9666623 - 2²⁰ = 8618047 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9666323) 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, 4833311 + 4833312.

It is an arithmetic number, because the mean of its divisors is an integer number (4833312).

Almost surely, 2^9666623 is an apocalyptic number.

9666623 is a deficient number, since it is larger than the sum of its proper divisors (1).

9666623 is an equidigital number, since it uses as much as digits as its factorization.

9666623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 38.

The square root of 9666623 is about 3109.1193286846. The cubic root of 9666623 is about 213.0222301881.

The spelling of 9666623 in words is "nine million, six hundred sixty-six thousand, six hundred twenty-three".