678599335960 has 640 divisors, whose sum is σ = 2012525222400. Its totient is φ = 204459171840.

The previous prime is 678599335819. The next prime is 678599335963. The reversal of 678599335960 is 69533995876.

It is a happy number.

678599335960 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (70).

It is a self number, because there is not a number n which added to its sum of digits gives 678599335960.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678599335963) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 3444666582 + ... + 3444666778.

It is an arithmetic number, because the mean of its divisors is an integer number (3144570660).

Almost surely, 2^678599335960 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 678599335960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1006262611200).

678599335960 is an abundant number, since it is smaller than the sum of its proper divisors (1333925886440).

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

678599335960 is a wasteful number, since it uses less digits than its factorization.

678599335960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 330674400, while the sum is 70.

The spelling of 678599335960 in words is "six hundred seventy-eight billion, five hundred ninety-nine million, three hundred thirty-five thousand, nine hundred sixty".