9866794812 has 96 divisors (see below), whose sum is σ = 27133123584. Its totient is φ = 2731968000.

The previous prime is 9866794799. The next prime is 9866794831. The reversal of 9866794812 is 2184976689.

9866794812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×9866794812² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 510558 + ... + 529530.

It is an arithmetic number, because the mean of its divisors is an integer number (282636704).

Almost surely, 2^9866794812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9866794812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13566561792).

9866794812 is an abundant number, since it is smaller than the sum of its proper divisors (17266328772).

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

9866794812 is a wasteful number, since it uses less digits than its factorization.

9866794812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19179 (or 19177 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 60.

The square root of 9866794812 is about 99331.7412109543. The cubic root of 9866794812 is about 2144.8258353164.

The spelling of 9866794812 in words is "nine billion, eight hundred sixty-six million, seven hundred ninety-four thousand, eight hundred twelve".