678342715776 has 256 divisors, whose sum is σ = 2187777600000. Its totient is φ = 205208340480.

The previous prime is 678342715717. The next prime is 678342715807. The reversal of 678342715776 is 677517243876.

678342715776 is a `hidden beast` number, since 6 + 7 + 8 + 34 + 27 + 1 + 577 + 6 = 666.

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, 22756690 + ... + 22786478.

It is an arithmetic number, because the mean of its divisors is an integer number (8546006250).

Almost surely, 2^678342715776 is an apocalyptic number.

678342715776 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 678342715776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1093888800000).

678342715776 is an abundant number, since it is smaller than the sum of its proper divisors (1509434884224).

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

678342715776 is a wasteful number, since it uses less digits than its factorization.

678342715776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30422 (or 30404 counting only the distinct ones).

The product of its digits is 82978560, while the sum is 63.

The spelling of 678342715776 in words is "six hundred seventy-eight billion, three hundred forty-two million, seven hundred fifteen thousand, seven hundred seventy-six".