6643702838443 has 8 divisors (see below), whose sum is σ = 7247867777280. Its totient is φ = 6039569891880.

The previous prime is 6643702838429. The next prime is 6643702838467. The reversal of 6643702838443 is 3448382073466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6643702838443 - 2²¹ = 6643700741291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6643702838543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7562823 + ... + 8395456.

It is an arithmetic number, because the mean of its divisors is an integer number (905983472160).

Almost surely, 2^{6643702838443} is an apocalyptic number.

6643702838443 is a deficient number, since it is larger than the sum of its proper divisors (604164938837).

6643702838443 is a wasteful number, since it uses less digits than its factorization.

6643702838443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15996137.

The product of its (nonzero) digits is 55738368, while the sum is 58.

The spelling of 6643702838443 in words is "six trillion, six hundred forty-three billion, seven hundred two million, eight hundred thirty-eight thousand, four hundred forty-three".