6778426439 has 8 divisors (see below), whose sum is σ = 7489208160. Its totient is φ = 6102317056.

The previous prime is 6778426423. The next prime is 6778426469. The reversal of 6778426439 is 9346248776.

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 6778426439 - 2⁴ = 6778426423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6778426469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8667674 + ... + 8668455.

It is an arithmetic number, because the mean of its divisors is an integer number (936151020).

Almost surely, 2^6778426439 is an apocalyptic number.

6778426439 is a deficient number, since it is larger than the sum of its proper divisors (710781721).

6778426439 is a wasteful number, since it uses less digits than its factorization.

6778426439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17336169.

The product of its digits is 12192768, while the sum is 56.

The square root of 6778426439 is about 82331.1996693841. The cubic root of 6778426439 is about 1892.5308274259.

The spelling of 6778426439 in words is "six billion, seven hundred seventy-eight million, four hundred twenty-six thousand, four hundred thirty-nine".