678487784876 has 24 divisors (see below), whose sum is σ = 1317249017280. Its totient is φ = 303176358800.

The previous prime is 678487784857. The next prime is 678487784911.

It is a happy number.

678487784876 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 678487784876.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130676870 + ... + 130682061.

It is an arithmetic number, because the mean of its divisors is an integer number (54885375720).

Almost surely, 2^678487784876 is an apocalyptic number.

It is an amenable number.

678487784876 is a deficient number, since it is larger than the sum of its proper divisors (638761232404).

678487784876 is a wasteful number, since it uses less digits than its factorization.

678487784876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261359005 (or 261359003 counting only the distinct ones).

The product of its digits is 5664669696, while the sum is 80.

The spelling of 678487784876 in words is "six hundred seventy-eight billion, four hundred eighty-seven million, seven hundred eighty-four thousand, eight hundred seventy-six".