67686926971 has 4 divisors (see below), whose sum is σ = 67757953032. Its totient is φ = 67615900912.

The previous prime is 67686926917. The next prime is 67686927013. The reversal of 67686926971 is 17962968676.

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 67686926971 - 2⁹ = 67686926459 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67686926897 and 67686926906.

It is not an unprimeable number, because it can be changed into a prime (67686936971) 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, 35511601 + ... + 35513506.

It is an arithmetic number, because the mean of its divisors is an integer number (16939488258).

Almost surely, 2^67686926971 is an apocalyptic number.

67686926971 is a deficient number, since it is larger than the sum of its proper divisors (71026061).

67686926971 is an equidigital number, since it uses as much as digits as its factorization.

67686926971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71026060.

The product of its digits is 82301184, while the sum is 67.

The spelling of 67686926971 in words is "sixty-seven billion, six hundred eighty-six million, nine hundred twenty-six thousand, nine hundred seventy-one".