6778003 has 4 divisors (see below), whose sum is σ = 7134760. Its totient is φ = 6421248.

The previous prime is 6777989. The next prime is 6778021. The reversal of 6778003 is 3008776.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6778003 - 2⁵ = 6777971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6778033) 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 in 3 ways as a sum of consecutive naturals, for example, 178350 + ... + 178387.

It is an arithmetic number, because the mean of its divisors is an integer number (1783690).

Almost surely, 2^6778003 is an apocalyptic number.

6778003 is a deficient number, since it is larger than the sum of its proper divisors (356757).

6778003 is a wasteful number, since it uses less digits than its factorization.

6778003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356756.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 6778003 is about 2603.4598134022. The cubic root of 6778003 is about 189.2491418670.

The spelling of 6778003 in words is "six million, seven hundred seventy-eight thousand, three".