67979878878 has 32 divisors (see below), whose sum is σ = 143499312000. Its totient is φ = 21409763616.

The previous prime is 67979878871. The next prime is 67979878909. The reversal of 67979878878 is 87887897976.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 67979878878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67979878871) by changing a digit.

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, 756828 + ... + 841871.

It is an arithmetic number, because the mean of its divisors is an integer number (4484353500).

Almost surely, 2^67979878878 is an apocalyptic number.

67979878878 is an abundant number, since it is smaller than the sum of its proper divisors (75519433122).

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

67979878878 is a wasteful number, since it uses less digits than its factorization.

67979878878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599096.

The product of its digits is 4779565056, while the sum is 84.

The spelling of 67979878878 in words is "sixty-seven billion, nine hundred seventy-nine million, eight hundred seventy-eight thousand, eight hundred seventy-eight".