6678738812 has 12 divisors (see below), whose sum is σ = 11688368496. Its totient is φ = 3339204960.

The previous prime is 6678738793. The next prime is 6678738907. The reversal of 6678738812 is 2188378766.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123512 + ... + 169152.

It is an arithmetic number, because the mean of its divisors is an integer number (974030708).

Almost surely, 2^6678738812 is an apocalyptic number.

It is an amenable number.

6678738812 is a deficient number, since it is larger than the sum of its proper divisors (5009629684).

6678738812 is a wasteful number, since it uses less digits than its factorization.

6678738812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82228 (or 82226 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 56.

The square root of 6678738812 is about 81723.5511465330. The cubic root of 6678738812 is about 1883.2074051041.

The spelling of 6678738812 in words is "six billion, six hundred seventy-eight million, seven hundred thirty-eight thousand, eight hundred twelve".