6613638208 has 56 divisors (see below), whose sum is σ = 13629095424. Its totient is φ = 3180825600.

The previous prime is 6613638203. The next prime is 6613638253. The reversal of 6613638208 is 8028363166.

It is a super-3 number, since 3×6613638208³ (a number of 30 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (6613638203) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 321348 + ... + 341308.

It is an arithmetic number, because the mean of its divisors is an integer number (243376704).

Almost surely, 2^6613638208 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 6613638208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6814547712).

6613638208 is an abundant number, since it is smaller than the sum of its proper divisors (7015457216).

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

6613638208 is a wasteful number, since it uses less digits than its factorization.

6613638208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20171 (or 20161 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 6613638208 is about 81324.2780970111. The cubic root of 6613638208 is about 1877.0685989170.

The spelling of 6613638208 in words is "six billion, six hundred thirteen million, six hundred thirty-eight thousand, two hundred eight".