6778403 has 2 divisors, whose sum is σ = 6778404. Its totient is φ = 6778402.

The previous prime is 6778397. The next prime is 6778417. The reversal of 6778403 is 3048776.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6778403 - 2⁶ = 6778339 is a prime.

It is a super-4 number, since 4×6778403⁴ (a number of 28 digits) contains 4444 as substring.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (6778423) 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, 3389201 + 3389202.

It is an arithmetic number, because the mean of its divisors is an integer number (3389202).

Almost surely, 2^6778403 is an apocalyptic number.

6778403 is a deficient number, since it is larger than the sum of its proper divisors (1).

6778403 is an equidigital number, since it uses as much as digits as its factorization.

6778403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 6778403 is about 2603.5366331204. The cubic root of 6778403 is about 189.2528646040.

The spelling of 6778403 in words is "six million, seven hundred seventy-eight thousand, four hundred three".