6778134816 has 24 divisors (see below), whose sum is σ = 17792604144. Its totient is φ = 2259378240.

The previous prime is 6778134809. The next prime is 6778134817. The reversal of 6778134816 is 6184318776.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×6778134816² = 91886223167742707712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6778134817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35302690 + ... + 35302881.

It is an arithmetic number, because the mean of its divisors is an integer number (741358506).

Almost surely, 2^6778134816 is an apocalyptic number.

It is an amenable number.

6778134816 is an abundant number, since it is smaller than the sum of its proper divisors (11014469328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6778134816 is a wasteful number, since it uses less digits than its factorization.

6778134816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70605584 (or 70605576 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 51.

The square root of 6778134816 is about 82329.4286145604. The cubic root of 6778134816 is about 1892.5036867398.

The spelling of 6778134816 in words is "six billion, seven hundred seventy-eight million, one hundred thirty-four thousand, eight hundred sixteen".