8165668992 has 128 divisors (see below), whose sum is σ = 23499168000. Its totient is φ = 2512253952.

The previous prime is 8165668991. The next prime is 8165669003. The reversal of 8165668992 is 2998665618.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-3 number, since 3×8165668992³ (a number of 31 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (8165668991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 838809 + ... + 848487.

It is an arithmetic number, because the mean of its divisors is an integer number (183587250).

Almost surely, 2^8165668992 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 8165668992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11749584000).

8165668992 is an abundant number, since it is smaller than the sum of its proper divisors (15333499008).

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

8165668992 is an equidigital number, since it uses as much as digits as its factorization.

8165668992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9735 (or 9697 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 60.

The square root of 8165668992 is about 90364.0912752405. The cubic root of 8165668992 is about 2013.7115314648.

The spelling of 8165668992 in words is "eight billion, one hundred sixty-five million, six hundred sixty-eight thousand, nine hundred ninety-two".