6778718807 has 16 divisors (see below), whose sum is σ = 7781709312. Its totient is φ = 5784430560.

The previous prime is 6778718783. The next prime is 6778718809. The reversal of 6778718807 is 7088178776.

It is a cyclic number.

It is not a de Polignac number, because 6778718807 - 2⁶ = 6778718743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6778718809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2286308 + ... + 2289270.

It is an arithmetic number, because the mean of its divisors is an integer number (486356832).

Almost surely, 2^6778718807 is an apocalyptic number.

6778718807 is a deficient number, since it is larger than the sum of its proper divisors (1002990505).

6778718807 is a wasteful number, since it uses less digits than its factorization.

6778718807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4318.

The product of its (nonzero) digits is 7375872, while the sum is 59.

The square root of 6778718807 is about 82332.9752104222. The cubic root of 6778718807 is about 1892.5580366660.

The spelling of 6778718807 in words is "six billion, seven hundred seventy-eight million, seven hundred eighteen thousand, eight hundred seven".