6778907794 has 8 divisors (see below), whose sum is σ = 10766500668. Its totient is φ = 3190074240.

The previous prime is 6778907791. The next prime is 6778907801. The reversal of 6778907794 is 4977098776.

It can be written as a sum of positive squares in 2 ways, for example, as 6207076225 + 571831569 = 78785^2 + 23913^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6778907791) 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, 99689787 + ... + 99689854.

Almost surely, 2^6778907794 is an apocalyptic number.

6778907794 is a deficient number, since it is larger than the sum of its proper divisors (3987592874).

6778907794 is a wasteful number, since it uses less digits than its factorization.

6778907794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199379660.

The product of its (nonzero) digits is 37340352, while the sum is 64.

The square root of 6778907794 is about 82334.1229017471. The cubic root of 6778907794 is about 1892.5756243327.

The spelling of 6778907794 in words is "six billion, seven hundred seventy-eight million, nine hundred seven thousand, seven hundred ninety-four".