67838027778 has 12 divisors (see below), whose sum is σ = 146982393558. Its totient is φ = 22612675920.

The previous prime is 67838027737. The next prime is 67838027797. The reversal of 67838027778 is 87772083876.

It can be written as a sum of positive squares in only one way, i.e., 67837848849 + 178929 = 260457^2 + 423^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1884389643 + ... + 1884389678.

Almost surely, 2^67838027778 is an apocalyptic number.

67838027778 is an abundant number, since it is smaller than the sum of its proper divisors (79144365780).

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

67838027778 is a wasteful number, since it uses less digits than its factorization.

67838027778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3768779329 (or 3768779326 counting only the distinct ones).

The product of its (nonzero) digits is 44255232, while the sum is 63.

The spelling of 67838027778 in words is "sixty-seven billion, eight hundred thirty-eight million, twenty-seven thousand, seven hundred seventy-eight".