9963866 has 32 divisors (see below), whose sum is σ = 17392320. Its totient is φ = 4268880.

The previous prime is 9963839. The next prime is 9963871. The reversal of 9963866 is 6683699.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 9963866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50480 + ... + 50676.

It is an arithmetic number, because the mean of its divisors is an integer number (543510).

Almost surely, 2^9963866 is an apocalyptic number.

9963866 is a deficient number, since it is larger than the sum of its proper divisors (7428454).

9963866 is a wasteful number, since it uses less digits than its factorization.

9963866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 229 counting only the distinct ones).

The product of its digits is 419904, while the sum is 47.

The square root of 9963866 is about 3156.5592026762. The cubic root of 9963866 is about 215.1836613448.

The spelling of 9963866 in words is "nine million, nine hundred sixty-three thousand, eight hundred sixty-six".