6778929168 has 90 divisors (see below), whose sum is σ = 20853119742. Its totient is φ = 2054215680.

The previous prime is 6778929121. The next prime is 6778929169. The reversal of 6778929168 is 8619298776.

It can be written as a sum of positive squares in only one way, i.e., 5005845504 + 1773083664 = 70752^2 + 42108^2 .

It is a super-2 number, since 2×6778929168² = 91907761329522344448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6778929169) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 177105 + ... + 211952.

Almost surely, 2^6778929168 is an apocalyptic number.

It is an amenable number.

6778929168 is an abundant number, since it is smaller than the sum of its proper divisors (14074190574).

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

6778929168 is a wasteful number, since it uses less digits than its factorization.

6778929168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389093 (or 389073 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 63.

The square root of 6778929168 is about 82334.2527020195. The cubic root of 6778929168 is about 1892.5776134373.

The spelling of 6778929168 in words is "six billion, seven hundred seventy-eight million, nine hundred twenty-nine thousand, one hundred sixty-eight".