6678385840 has 160 divisors (see below), whose sum is σ = 18304828416. Its totient is φ = 2218644480.

The previous prime is 6678385811. The next prime is 6678385841. The reversal of 6678385840 is 485838766.

It is not an unprimeable number, because it can be changed into a prime (6678385841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2462085 + ... + 2464795.

Almost surely, 2^6678385840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6678385840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9152414208).

6678385840 is an abundant number, since it is smaller than the sum of its proper divisors (11626442576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6678385840 is a wasteful number, since it uses less digits than its factorization.

6678385840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2867 (or 2861 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 55.

The square root of 6678385840 is about 81721.3915691602. The cubic root of 6678385840 is about 1883.1742286211.

The spelling of 6678385840 in words is "six billion, six hundred seventy-eight million, three hundred eighty-five thousand, eight hundred forty".