67397891888 has 40 divisors (see below), whose sum is σ = 132434529600. Its totient is φ = 33222518784.

The previous prime is 67397891887. The next prime is 67397891923. The reversal of 67397891888 is 88819879376.

It is not an unprimeable number, because it can be changed into a prime (67397891881) 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 7 ways as a sum of consecutive naturals, for example, 811058 + ... + 890286.

It is an arithmetic number, because the mean of its divisors is an integer number (3310863240).

Almost surely, 2^67397891888 is an apocalyptic number.

It is an amenable number.

67397891888 is a deficient number, since it is larger than the sum of its proper divisors (65036637712).

67397891888 is a wasteful number, since it uses less digits than its factorization.

67397891888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79989 (or 79983 counting only the distinct ones).

The product of its digits is 292626432, while the sum is 74.

The spelling of 67397891888 in words is "sixty-seven billion, three hundred ninety-seven million, eight hundred ninety-one thousand, eight hundred eighty-eight".