6778825 has 12 divisors (see below), whose sum is σ = 8445888. Its totient is φ = 5397200.

The previous prime is 6778823. The next prime is 6778829. The reversal of 6778825 is 5288776.

It is a happy number.

It is not a de Polignac number, because 6778825 - 2¹ = 6778823 is a prime.

It is a Duffinian number.

6778825 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6778823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6060 + ... + 7090.

It is an arithmetic number, because the mean of its divisors is an integer number (703824).

Almost surely, 2^6778825 is an apocalyptic number.

It is an amenable number.

6778825 is a deficient number, since it is larger than the sum of its proper divisors (1667063).

6778825 is a wasteful number, since it uses less digits than its factorization.

6778825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304 (or 1299 counting only the distinct ones).

The product of its digits is 188160, while the sum is 43.

The square root of 6778825 is about 2603.6176754662. The cubic root of 6778825 is about 189.2567919328.

The spelling of 6778825 in words is "six million, seven hundred seventy-eight thousand, eight hundred twenty-five".