6645326336 has 240 divisors, whose sum is σ = 15910285248. Its totient is φ = 2743910400.

The previous prime is 6645326321. The next prime is 6645326351. The reversal of 6645326336 is 6336235466.

It is an interprime number because it is at equal distance from previous prime (6645326321) and next prime (6645326351).

It is a super-2 number, since 2×6645326336² = 88320724223870369792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108939746 + ... + 108939806.

Almost surely, 2^6645326336 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 6645326336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7955142624).

6645326336 is an abundant number, since it is smaller than the sum of its proper divisors (9264958912).

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

6645326336 is a wasteful number, since it uses less digits than its factorization.

6645326336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 126 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 44.

The square root of 6645326336 is about 81518.8710422317. The cubic root of 6645326336 is about 1880.0617091560.

The spelling of 6645326336 in words is "six billion, six hundred forty-five million, three hundred twenty-six thousand, three hundred thirty-six".