6641928918 has 24 divisors (see below), whose sum is σ = 14539209048. Its totient is φ = 2191151232.

The previous prime is 6641928893. The next prime is 6641928919. The reversal of 6641928918 is 8198291466.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6641928919) 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 11 ways as a sum of consecutive naturals, for example, 1900296 + ... + 1903787.

It is an arithmetic number, because the mean of its divisors is an integer number (605800377).

Almost surely, 2^6641928918 is an apocalyptic number.

6641928918 is an abundant number, since it is smaller than the sum of its proper divisors (7897280130).

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

6641928918 is a wasteful number, since it uses less digits than its factorization.

6641928918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3804188 (or 3804185 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 6641928918 is about 81498.0301479735. The cubic root of 6641928918 is about 1879.7412611705.

The spelling of 6641928918 in words is "six billion, six hundred forty-one million, nine hundred twenty-eight thousand, nine hundred eighteen".