6621811296 has 96 divisors (see below), whose sum is σ = 18887500800. Its totient is φ = 2023626240.

The previous prime is 6621811291. The next prime is 6621811349. The reversal of 6621811296 is 6921181266.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6621811291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2011 + ... + 115098.

It is an arithmetic number, because the mean of its divisors is an integer number (196744800).

Almost surely, 2^6621811296 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 6621811296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9443750400).

6621811296 is an abundant number, since it is smaller than the sum of its proper divisors (12265689504).

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

6621811296 is a wasteful number, since it uses less digits than its factorization.

6621811296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117172 (or 117164 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 6621811296 is about 81374.5125699687. The cubic root of 6621811296 is about 1877.8415033848.

The spelling of 6621811296 in words is "six billion, six hundred twenty-one million, eight hundred eleven thousand, two hundred ninety-six".