6778445 has 8 divisors (see below), whose sum is σ = 8487936. Its totient is φ = 5186896.

The previous prime is 6778439. The next prime is 6778463. The reversal of 6778445 is 5448776.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6778445 - 2²⁰ = 5729869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29357 + ... + 29586.

It is an arithmetic number, because the mean of its divisors is an integer number (1060992).

Almost surely, 2^6778445 is an apocalyptic number.

It is an amenable number.

6778445 is a deficient number, since it is larger than the sum of its proper divisors (1709491).

6778445 is a wasteful number, since it uses less digits than its factorization.

6778445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58971.

The product of its digits is 188160, while the sum is 41.

The square root of 6778445 is about 2603.5446990593. The cubic root of 6778445 is about 189.2532554829.

The spelling of 6778445 in words is "six million, seven hundred seventy-eight thousand, four hundred forty-five".