678986689876 has 24 divisors (see below), whose sum is σ = 1296389001600. Its totient is φ = 308596579200.

The previous prime is 678986689847. The next prime is 678986689889.

678986689876 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×678986689876² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434005 + ... + 1243516.

It is an arithmetic number, because the mean of its divisors is an integer number (54016208400).

Almost surely, 2^678986689876 is an apocalyptic number.

It is an amenable number.

678986689876 is a deficient number, since it is larger than the sum of its proper divisors (617402311724).

678986689876 is a wasteful number, since it uses less digits than its factorization.

678986689876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686735 (or 1686733 counting only the distinct ones).

The product of its digits is 21069103104, while the sum is 88.

The spelling of 678986689876 in words is "six hundred seventy-eight billion, nine hundred eighty-six million, six hundred eighty-nine thousand, eight hundred seventy-six".