6778799 has 2 divisors, whose sum is σ = 6778800. Its totient is φ = 6778798.

The previous prime is 6778777. The next prime is 6778823. The reversal of 6778799 is 9978776.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6778799 - 2⁸ = 6778543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6778799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6778769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3389399 + 3389400.

It is an arithmetic number, because the mean of its divisors is an integer number (3389400).

Almost surely, 2^6778799 is an apocalyptic number.

6778799 is a deficient number, since it is larger than the sum of its proper divisors (1).

6778799 is an equidigital number, since it uses as much as digits as its factorization.

6778799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1333584, while the sum is 53.

The square root of 6778799 is about 2603.6126824088. The cubic root of 6778799 is about 189.2565499694.

The spelling of 6778799 in words is "six million, seven hundred seventy-eight thousand, seven hundred ninety-nine".