9903966 has 16 divisors (see below), whose sum is σ = 19884288. Its totient is φ = 3288600.

The previous prime is 9903953. The next prime is 9903977. The reversal of 9903966 is 6693099.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1420 + ... + 4671.

It is an arithmetic number, because the mean of its divisors is an integer number (1242768).

Almost surely, 2^9903966 is an apocalyptic number.

9903966 is an abundant number, since it is smaller than the sum of its proper divisors (9980322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9903966 is a wasteful number, since it uses less digits than its factorization.

9903966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6367.

The product of its (nonzero) digits is 78732, while the sum is 42.

The square root of 9903966 is about 3147.0567201752. The cubic root of 9903966 is about 214.7515861745.

The spelling of 9903966 in words is "nine million, nine hundred three thousand, nine hundred sixty-six".