6778351 has 2 divisors, whose sum is σ = 6778352. Its totient is φ = 6778350.

The previous prime is 6778339. The next prime is 6778379. The reversal of 6778351 is 1538776.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6778351 - 2⁵ = 6778319 is a prime.

6778351 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6778351.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6778301) 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, 3389175 + 3389176.

It is an arithmetic number, because the mean of its divisors is an integer number (3389176).

Almost surely, 2^6778351 is an apocalyptic number.

6778351 is a deficient number, since it is larger than the sum of its proper divisors (1).

6778351 is an equidigital number, since it uses as much as digits as its factorization.

6778351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 37.

The square root of 6778351 is about 2603.5266466852. The cubic root of 6778351 is about 189.2523806565.

The spelling of 6778351 in words is "six million, seven hundred seventy-eight thousand, three hundred fifty-one".