6778755 has 32 divisors (see below), whose sum is σ = 12168000. Its totient is φ = 3580416.

The previous prime is 6778741. The next prime is 6778769. The reversal of 6778755 is 5578776.

It is an interprime number because it is at equal distance from previous prime (6778741) and next prime (6778769).

It is not a de Polignac number, because 6778755 - 2⁶ = 6778691 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6778755.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19947 + ... + 20283.

It is an arithmetic number, because the mean of its divisors is an integer number (380250).

Almost surely, 2^6778755 is an apocalyptic number.

6778755 is a deficient number, since it is larger than the sum of its proper divisors (5389245).

6778755 is a wasteful number, since it uses less digits than its factorization.

6778755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 494 counting only the distinct ones).

The product of its digits is 411600, while the sum is 45.

The square root of 6778755 is about 2603.6042325976. The cubic root of 6778755 is about 189.2561404915.

The spelling of 6778755 in words is "six million, seven hundred seventy-eight thousand, seven hundred fifty-five".