67690487808 has 448 divisors, whose sum is σ = 212087764800. Its totient is φ = 21304442880.

The previous prime is 67690487773. The next prime is 67690487897. The reversal of 67690487808 is 80878409676.

67690487808 is a `hidden beast` number, since 6 + 76 + 9 + 0 + 487 + 80 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 391274410 + ... + 391274582.

Almost surely, 2^67690487808 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 67690487808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106043882400).

67690487808 is an abundant number, since it is smaller than the sum of its proper divisors (144397276992).

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

67690487808 is a wasteful number, since it uses less digits than its factorization.

67690487808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 63.

The spelling of 67690487808 in words is "sixty-seven billion, six hundred ninety million, four hundred eighty-seven thousand, eight hundred eight".