6671745640 has 64 divisors (see below), whose sum is σ = 17242272000. Its totient is φ = 2275941888.

The previous prime is 6671745607. The next prime is 6671745643. The reversal of 6671745640 is 465471766.

It is not an unprimeable number, because it can be changed into a prime (6671745643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4149 + ... + 115588.

It is an arithmetic number, because the mean of its divisors is an integer number (269410500).

Almost surely, 2^6671745640 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 6671745640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8621136000).

6671745640 is an abundant number, since it is smaller than the sum of its proper divisors (10570526360).

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

6671745640 is a wasteful number, since it uses less digits than its factorization.

6671745640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119954 (or 119950 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 46.

The square root of 6671745640 is about 81680.7544039598. The cubic root of 6671745640 is about 1882.5498861284.

The spelling of 6671745640 in words is "six billion, six hundred seventy-one million, seven hundred forty-five thousand, six hundred forty".