6678779 has 2 divisors, whose sum is σ = 6678780. Its totient is φ = 6678778.

The previous prime is 6678767. The next prime is 6678797. The reversal of 6678779 is 9778766.

6678779 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (6678797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6678779 - 2⁸ = 6678523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6678799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3339389 + 3339390.

It is an arithmetic number, because the mean of its divisors is an integer number (3339390).

Almost surely, 2^6678779 is an apocalyptic number.

6678779 is a deficient number, since it is larger than the sum of its proper divisors (1).

6678779 is an equidigital number, since it uses as much as digits as its factorization.

6678779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 889056, while the sum is 50.

The square root of 6678779 is about 2584.3333763274. Note that the first 4 decimals coincide. The cubic root of 6678779 is about 188.3211182374.

It can be divided in two parts, 66787 and 79, that added together give a palindrome (66866).

The spelling of 6678779 in words is "six million, six hundred seventy-eight thousand, seven hundred seventy-nine".