678866668876 has 12 divisors (see below), whose sum is σ = 1296018186120. Its totient is φ = 308575758560.

The previous prime is 678866668817. The next prime is 678866668877.

678866668876 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×678866668876² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 678866668876.

It is not an unprimeable number, because it can be changed into a prime (678866668877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7714393921 + ... + 7714394008.

It is an arithmetic number, because the mean of its divisors is an integer number (108001515510).

Almost surely, 2^678866668876 is an apocalyptic number.

It is an amenable number.

678866668876 is a deficient number, since it is larger than the sum of its proper divisors (617151517244).

678866668876 is a wasteful number, since it uses less digits than its factorization.

678866668876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15428787944 (or 15428787942 counting only the distinct ones).

The product of its digits is 9364045824, while the sum is 82.

The spelling of 678866668876 in words is "six hundred seventy-eight billion, eight hundred sixty-six million, six hundred sixty-eight thousand, eight hundred seventy-six".