6641005641 has 16 divisors (see below), whose sum is σ = 8988672000. Its totient is φ = 4360840848.

The previous prime is 6641005639. The next prime is 6641005663. The reversal of 6641005641 is 1465001466.

It is a happy number.

It is not a de Polignac number, because 6641005641 - 2¹ = 6641005639 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6641005601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9741 + ... + 115658.

It is an arithmetic number, because the mean of its divisors is an integer number (561792000).

Almost surely, 2^6641005641 is an apocalyptic number.

It is an amenable number.

6641005641 is a deficient number, since it is larger than the sum of its proper divisors (2347666359).

6641005641 is a wasteful number, since it uses less digits than its factorization.

6641005641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125668.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 6641005641 is about 81492.3655381288. The cubic root of 6641005641 is about 1879.6541578447.

The spelling of 6641005641 in words is "six billion, six hundred forty-one million, five thousand, six hundred forty-one".