67668137108 has 48 divisors (see below), whose sum is σ = 139148694720. Its totient is φ = 28386758400.

The previous prime is 67668137107. The next prime is 67668137113. The reversal of 67668137108 is 80173186676.

67668137108 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 67668137108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67668137107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4573763 + ... + 4588533.

It is an arithmetic number, because the mean of its divisors is an integer number (2898931140).

Almost surely, 2^67668137108 is an apocalyptic number.

It is an amenable number.

67668137108 is an abundant number, since it is smaller than the sum of its proper divisors (71480557612).

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

67668137108 is a wasteful number, since it uses less digits than its factorization.

67668137108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22808 (or 22806 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 53.

Adding to 67668137108 its sum of digits (53), we get a square (67668137161 = 260131²).

The spelling of 67668137108 in words is "sixty-seven billion, six hundred sixty-eight million, one hundred thirty-seven thousand, one hundred eight".