678684486876 has 96 divisors (see below), whose sum is σ = 1738665347328. Its totient is φ = 204342620160.

The previous prime is 678684486863. The next prime is 678684486913.

678684486876 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×678684486876² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21052546 + ... + 21084758.

It is an arithmetic number, because the mean of its divisors is an integer number (18111097368).

Almost surely, 2^678684486876 is an apocalyptic number.

678684486876 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678684486876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (869332673664).

678684486876 is an abundant number, since it is smaller than the sum of its proper divisors (1059980860452).

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

678684486876 is a wasteful number, since it uses less digits than its factorization.

678684486876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33251 (or 33249 counting only the distinct ones).

The product of its digits is 4161798144, while the sum is 78.

The spelling of 678684486876 in words is "six hundred seventy-eight billion, six hundred eighty-four million, four hundred eighty-six thousand, eight hundred seventy-six".