9906866 has 16 divisors (see below), whose sum is σ = 15940800. Its totient is φ = 4603248.

The previous prime is 9906863. The next prime is 9906877. The reversal of 9906866 is 6686099.

9906866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (9906863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446 + ... + 4473.

It is an arithmetic number, because the mean of its divisors is an integer number (996300).

Almost surely, 2^9906866 is an apocalyptic number.

9906866 is a deficient number, since it is larger than the sum of its proper divisors (6033934).

9906866 is a wasteful number, since it uses less digits than its factorization.

9906866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4993.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 9906866 is about 3147.5174344235. The cubic root of 9906866 is about 214.7725447421.

The spelling of 9906866 in words is "nine million, nine hundred six thousand, eight hundred sixty-six".