67889556679 has 4 divisors (see below), whose sum is σ = 77588064784. Its totient is φ = 58191048576.

The previous prime is 67889556667. The next prime is 67889556737. The reversal of 67889556679 is 97665598876.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 67889556679 - 2⁷ = 67889556551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67889356679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4849254042 + ... + 4849254055.

It is an arithmetic number, because the mean of its divisors is an integer number (19397016196).

Almost surely, 2^67889556679 is an apocalyptic number.

67889556679 is a deficient number, since it is larger than the sum of its proper divisors (9698508105).

67889556679 is an equidigital number, since it uses as much as digits as its factorization.

67889556679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9698508104.

The product of its digits is 1371686400, while the sum is 76.

The spelling of 67889556679 in words is "sixty-seven billion, eight hundred eighty-nine million, five hundred fifty-six thousand, six hundred seventy-nine".