6778147 has 2 divisors, whose sum is σ = 6778148. Its totient is φ = 6778146.

The previous prime is 6778127. The next prime is 6778153. The reversal of 6778147 is 7418776.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6778147 - 2¹⁹ = 6253859 is a prime.

It is not a weakly prime, because it can be changed into another prime (6778127) 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 as a sum of consecutive naturals, namely, 3389073 + 3389074.

It is an arithmetic number, because the mean of its divisors is an integer number (3389074).

Almost surely, 2^6778147 is an apocalyptic number.

6778147 is a deficient number, since it is larger than the sum of its proper divisors (1).

6778147 is an equidigital number, since it uses as much as digits as its factorization.

6778147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65856, while the sum is 40.

The square root of 6778147 is about 2603.4874687619. The cubic root of 6778147 is about 189.2504820692.

The spelling of 6778147 in words is "six million, seven hundred seventy-eight thousand, one hundred forty-seven".