67666733443668 has 48 divisors (see below), whose sum is σ = 161251499566080. Its totient is φ = 22075245652704.

The previous prime is 67666733443637. The next prime is 67666733443717. The reversal of 67666733443668 is 86634433766676.

67666733443668 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 67666733443668.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28761903 + ... + 31025481.

It is an arithmetic number, because the mean of its divisors is an integer number (3359406240960).

Almost surely, 2^{67666733443668} is an apocalyptic number.

It is an amenable number.

67666733443668 is an abundant number, since it is smaller than the sum of its proper divisors (93584766122412).

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

67666733443668 is a wasteful number, since it uses less digits than its factorization.

67666733443668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316636 (or 2316634 counting only the distinct ones).

The product of its digits is 7900913664, while the sum is 75.

The spelling of 67666733443668 in words is "sixty-seven trillion, six hundred sixty-six billion, seven hundred thirty-three million, four hundred forty-three thousand, six hundred sixty-eight".