67871775691 has 2 divisors, whose sum is σ = 67871775692. Its totient is φ = 67871775690.

The previous prime is 67871775617. The next prime is 67871775709. The reversal of 67871775691 is 19657717876.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67871775691 - 2¹⁷ = 67871644619 is a prime.

It is not a weakly prime, because it can be changed into another prime (67871775611) 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, 33935887845 + 33935887846.

It is an arithmetic number, because the mean of its divisors is an integer number (33935887846).

Almost surely, 2^67871775691 is an apocalyptic number.

67871775691 is a deficient number, since it is larger than the sum of its proper divisors (1).

67871775691 is an equidigital number, since it uses as much as digits as its factorization.

67871775691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31116960, while the sum is 64.

The spelling of 67871775691 in words is "sixty-seven billion, eight hundred seventy-one million, seven hundred seventy-five thousand, six hundred ninety-one".