67691026368 has 168 divisors, whose sum is σ = 221974123488. Its totient is φ = 19320035328.

The previous prime is 67691026349. The next prime is 67691026373. The reversal of 67691026368 is 86362019676.

67691026368 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4076130 + ... + 4092702.

Almost surely, 2^67691026368 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 67691026368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110987061744).

67691026368 is an abundant number, since it is smaller than the sum of its proper divisors (154283097120).

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

67691026368 is a wasteful number, since it uses less digits than its factorization.

67691026368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17611 (or 17598 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 67691026368 in words is "sixty-seven billion, six hundred ninety-one million, twenty-six thousand, three hundred sixty-eight".