6778425872 has 20 divisors (see below), whose sum is σ = 13179946236. Its totient is φ = 3377149440.

The previous prime is 6778425853. The next prime is 6778425881. The reversal of 6778425872 is 2785248776.

It can be written as a sum of positive squares in 2 ways, for example, as 4742250496 + 2036175376 = 68864^2 + 45124^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 749333 + ... + 758324.

Almost surely, 2^6778425872 is an apocalyptic number.

It is an amenable number.

6778425872 is a deficient number, since it is larger than the sum of its proper divisors (6401520364).

6778425872 is a wasteful number, since it uses less digits than its factorization.

6778425872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507946 (or 1507940 counting only the distinct ones).

The product of its digits is 10536960, while the sum is 56.

The square root of 6778425872 is about 82331.1962259750. The cubic root of 6778425872 is about 1892.5307746572.

The spelling of 6778425872 in words is "six billion, seven hundred seventy-eight million, four hundred twenty-five thousand, eight hundred seventy-two".