67871617687 has 2 divisors, whose sum is σ = 67871617688. Its totient is φ = 67871617686.

The previous prime is 67871617663. The next prime is 67871617727. The reversal of 67871617687 is 78671617876.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67871617687 - 2⁷ = 67871617559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67871627687) 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 as a sum of consecutive naturals, namely, 33935808843 + 33935808844.

It is an arithmetic number, because the mean of its divisors is an integer number (33935808844).

Almost surely, 2^67871617687 is an apocalyptic number.

67871617687 is a deficient number, since it is larger than the sum of its proper divisors (1).

67871617687 is an equidigital number, since it uses as much as digits as its factorization.

67871617687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33191424, while the sum is 64.

The spelling of 67871617687 in words is "sixty-seven billion, eight hundred seventy-one million, six hundred seventeen thousand, six hundred eighty-seven".