16664043443 has 8 divisors (see below), whose sum is σ = 16814432736. Its totient is φ = 16513705600.

The previous prime is 16664043439. The next prime is 16664043449. The reversal of 16664043443 is 34434046661.

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 16664043443 - 2² = 16664043439 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 16664043443.

It is not an unprimeable number, because it can be changed into a prime (16664043449) 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, 979298 + ... + 996168.

It is an arithmetic number, because the mean of its divisors is an integer number (2101804092).

Almost surely, 2^16664043443 is an apocalyptic number.

16664043443 is a deficient number, since it is larger than the sum of its proper divisors (150389293).

16664043443 is a wasteful number, since it uses less digits than its factorization.

16664043443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25725.

The product of its (nonzero) digits is 497664, while the sum is 41.

The spelling of 16664043443 in words is "sixteen billion, six hundred sixty-four million, forty-three thousand, four hundred forty-three".