67668137142 has 32 divisors (see below), whose sum is σ = 137870208000. Its totient is φ = 22137143808.

The previous prime is 67668137113. The next prime is 67668137143. The reversal of 67668137142 is 24173186676.

It is a happy number.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348267 + ... + 506582.

It is an arithmetic number, because the mean of its divisors is an integer number (4308444000).

Almost surely, 2^67668137142 is an apocalyptic number.

67668137142 is an abundant number, since it is smaller than the sum of its proper divisors (70202070858).

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

67668137142 is a wasteful number, since it uses less digits than its factorization.

67668137142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855100.

The product of its digits is 2032128, while the sum is 51.

The spelling of 67668137142 in words is "sixty-seven billion, six hundred sixty-eight million, one hundred thirty-seven thousand, one hundred forty-two".