9821668906 has 8 divisors (see below), whose sum is σ = 16837146720. Its totient is φ = 4209286668.

The previous prime is 9821668903. The next prime is 9821668939. The reversal of 9821668906 is 6098661289.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (9821668903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350773876 + ... + 350773903.

It is an arithmetic number, because the mean of its divisors is an integer number (2104643340).

Almost surely, 2^9821668906 is an apocalyptic number.

9821668906 is a deficient number, since it is larger than the sum of its proper divisors (7015477814).

9821668906 is a wasteful number, since it uses less digits than its factorization.

9821668906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701547788.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The square root of 9821668906 is about 99104.3334370400. Note that the first 3 decimals coincide. The cubic root of 9821668906 is about 2141.5510421195.

The spelling of 9821668906 in words is "nine billion, eight hundred twenty-one million, six hundred sixty-eight thousand, nine hundred six".