67668136650 has 72 divisors (see below), whose sum is σ = 182556383724. Its totient is φ = 17969932800.

The previous prime is 67668136649. The next prime is 67668136673. The reversal of 67668136650 is 5663186676.

It can be written as a sum of positive squares in 6 ways, for example, as 10083975561 + 57584161089 = 100419^2 + 239967^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 203529 + ... + 420428.

Almost surely, 2^67668136650 is an apocalyptic number.

67668136650 is an abundant number, since it is smaller than the sum of its proper divisors (114888247074).

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

67668136650 is a wasteful number, since it uses less digits than its factorization.

67668136650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624216 (or 624208 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 67668136650 in words is "sixty-seven billion, six hundred sixty-eight million, one hundred thirty-six thousand, six hundred fifty".