6778504668 has 24 divisors (see below), whose sum is σ = 17033165968. Its totient is φ = 2085693696.

The previous prime is 6778504651. The next prime is 6778504669. The reversal of 6778504668 is 8664058776.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6778504669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21725821 + ... + 21726132.

Almost surely, 2^6778504668 is an apocalyptic number.

It is an amenable number.

6778504668 is an abundant number, since it is smaller than the sum of its proper divisors (10254661300).

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

6778504668 is a wasteful number, since it uses less digits than its factorization.

6778504668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43451973 (or 43451971 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 57.

The square root of 6778504668 is about 82331.6747552241. The cubic root of 6778504668 is about 1892.5381078877.

The spelling of 6778504668 in words is "six billion, seven hundred seventy-eight million, five hundred four thousand, six hundred sixty-eight".