6643074241 has 32 divisors (see below), whose sum is σ = 7365139488. Its totient is φ = 5966069760.

The previous prime is 6643074211. The next prime is 6643074247. The reversal of 6643074241 is 1424703466.

It can be written as a sum of positive squares in 16 ways, for example, as 1477633600 + 5165440641 = 38440^2 + 71871^2 .

It is not a de Polignac number, because 6643074241 - 2⁵ = 6643074209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6643074241.

It is not an unprimeable number, because it can be changed into a prime (6643074247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6970221 + ... + 6971173.

It is an arithmetic number, because the mean of its divisors is an integer number (230160609).

Almost surely, 2^6643074241 is an apocalyptic number.

It is an amenable number.

6643074241 is a deficient number, since it is larger than the sum of its proper divisors (722065247).

6643074241 is a wasteful number, since it uses less digits than its factorization.

6643074241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221.

The product of its (nonzero) digits is 96768, while the sum is 37.

The square root of 6643074241 is about 81505.0565363892. The cubic root of 6643074241 is about 1879.8493014296.

The spelling of 6643074241 in words is "six billion, six hundred forty-three million, seventy-four thousand, two hundred forty-one".