8328165621 has 8 divisors (see below), whose sum is σ = 11178746400. Its totient is φ = 5514847632.

The previous prime is 8328165619. The next prime is 8328165623. The reversal of 8328165621 is 1265618238.

It is an interprime number because it is at equal distance from previous prime (8328165619) and next prime (8328165623).

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

It is not a de Polignac number, because 8328165621 - 2¹ = 8328165619 is a prime.

It is a super-2 number, since 2×8328165621² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8328165623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9315175 + ... + 9316068.

It is an arithmetic number, because the mean of its divisors is an integer number (1397343300).

Almost surely, 2^8328165621 is an apocalyptic number.

It is an amenable number.

8328165621 is a deficient number, since it is larger than the sum of its proper divisors (2850580779).

8328165621 is a wasteful number, since it uses less digits than its factorization.

8328165621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18631395.

The product of its digits is 138240, while the sum is 42.

The square root of 8328165621 is about 91258.7838018894. The cubic root of 8328165621 is about 2026.9814975968.

The spelling of 8328165621 in words is "eight billion, three hundred twenty-eight million, one hundred sixty-five thousand, six hundred twenty-one".