67999799808 has 640 divisors, whose sum is σ = 228097900800. Its totient is φ = 19874709504.

The previous prime is 67999799801. The next prime is 67999799843. The reversal of 67999799808 is 80899799976.

It is not an unprimeable number, because it can be changed into a prime (67999799801) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 433119666 + ... + 433119822.

It is an arithmetic number, because the mean of its divisors is an integer number (356402970).

Almost surely, 2^67999799808 is an apocalyptic number.

67999799808 is a gapful number since it is divisible by the number (68) 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 67999799808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114048950400).

67999799808 is an abundant number, since it is smaller than the sum of its proper divisors (160098100992).

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

67999799808 is a wasteful number, since it uses less digits than its factorization.

67999799808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 1111065984, while the sum is 81.

The spelling of 67999799808 in words is "sixty-seven billion, nine hundred ninety-nine million, seven hundred ninety-nine thousand, eight hundred eight".