678991676976 has 240 divisors, whose sum is σ = 2001039925248. Its totient is φ = 222844608000.

The previous prime is 678991676947. The next prime is 678991677019. The reversal of 678991676976 is 679676199876.

It is a super-2 number, since 2×678991676976² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a junction number, because it is equal to n+sod(n) for n = 678991676895 and 678991676904.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 317730180 + ... + 317732316.

Almost surely, 2^678991676976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678991676976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1000519962624).

678991676976 is an abundant number, since it is smaller than the sum of its proper divisors (1322048248272).

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

678991676976 is a wasteful number, since it uses less digits than its factorization.

678991676976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3382 (or 3364 counting only the distinct ones).

The product of its digits is 2592487296, while the sum is 81.

The spelling of 678991676976 in words is "six hundred seventy-eight billion, nine hundred ninety-one million, six hundred seventy-six thousand, nine hundred seventy-six".