67668137144 has 16 divisors (see below), whose sum is σ = 129828403320. Its totient is φ = 33047229600.

The previous prime is 67668137143. The next prime is 67668137171. The reversal of 67668137144 is 44173186676.

It is a happy number.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67668137143) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 98354507 + ... + 98355194.

Almost surely, 2^67668137144 is an apocalyptic number.

It is an amenable number.

67668137144 is a deficient number, since it is larger than the sum of its proper divisors (62160266176).

67668137144 is a wasteful number, since it uses less digits than its factorization.

67668137144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196709750 (or 196709746 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 53.

The spelling of 67668137144 in words is "sixty-seven billion, six hundred sixty-eight million, one hundred thirty-seven thousand, one hundred forty-four".