6678812784 has 80 divisors (see below), whose sum is σ = 19735736832. Its totient is φ = 1906554624.

The previous prime is 6678812783. The next prime is 6678812827. The reversal of 6678812784 is 4872188766.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6678812783) 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, 402802 + ... + 419054.

Almost surely, 2^6678812784 is an apocalyptic number.

It is an amenable number.

6678812784 is an abundant number, since it is smaller than the sum of its proper divisors (13056924048).

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

6678812784 is a wasteful number, since it uses less digits than its factorization.

6678812784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17494 (or 17488 counting only the distinct ones).

The product of its digits is 7225344, while the sum is 57.

The square root of 6678812784 is about 81724.0037198374. The cubic root of 6678812784 is about 1883.2143577194.

The spelling of 6678812784 in words is "six billion, six hundred seventy-eight million, eight hundred twelve thousand, seven hundred eighty-four".