9926665992 has 160 divisors (see below), whose sum is σ = 28918264320. Its totient is φ = 3177895680.

The previous prime is 9926665949. The next prime is 9926665999. The reversal of 9926665992 is 2995666299.

9926665992 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 (9926665999) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 2750253 + ... + 2753859.

It is an arithmetic number, because the mean of its divisors is an integer number (180739152).

Almost surely, 2^9926665992 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 9926665992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14459132160).

9926665992 is an abundant number, since it is smaller than the sum of its proper divisors (18991598328).

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

9926665992 is a wasteful number, since it uses less digits than its factorization.

9926665992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3793 (or 3780 counting only the distinct ones).

The product of its digits is 28343520, while the sum is 63.

The square root of 9926665992 is about 99632.6552491702. The cubic root of 9926665992 is about 2149.1553193165.

The spelling of 9926665992 in words is "nine billion, nine hundred twenty-six million, six hundred sixty-five thousand, nine hundred ninety-two".