6678989643 has 8 divisors (see below), whose sum is σ = 8908570000. Its totient is φ = 4451034528.

The previous prime is 6678989633. The next prime is 6678989651. The reversal of 6678989643 is 3469898766.

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

It is not a de Polignac number, because 6678989643 - 2⁶ = 6678989579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6678989633) 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, 396688 + ... + 413181.

It is an arithmetic number, because the mean of its divisors is an integer number (1113571250).

Almost surely, 2^6678989643 is an apocalyptic number.

6678989643 is a deficient number, since it is larger than the sum of its proper divisors (2229580357).

6678989643 is a wasteful number, since it uses less digits than its factorization.

6678989643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812621.

The product of its digits is 94058496, while the sum is 66.

The square root of 6678989643 is about 81725.0857631853. The cubic root of 6678989643 is about 1883.2309804575.

The spelling of 6678989643 in words is "six billion, six hundred seventy-eight million, nine hundred eighty-nine thousand, six hundred forty-three".