67688581673 has 2 divisors, whose sum is σ = 67688581674. Its totient is φ = 67688581672.

The previous prime is 67688581643. The next prime is 67688581711. The reversal of 67688581673 is 37618588676.

67688581673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39597816064 + 28090765609 = 198992^2 + 167603^2 .

It is a cyclic number.

It is not a de Polignac number, because 67688581673 - 2¹⁸ = 67688319529 is a prime.

It is not a weakly prime, because it can be changed into another prime (67688581603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33844290836 + 33844290837.

It is an arithmetic number, because the mean of its divisors is an integer number (33844290837).

Almost surely, 2^67688581673 is an apocalyptic number.

It is an amenable number.

67688581673 is a deficient number, since it is larger than the sum of its proper divisors (1).

67688581673 is an equidigital number, since it uses as much as digits as its factorization.

67688581673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81285120, while the sum is 65.

The spelling of 67688581673 in words is "sixty-seven billion, six hundred eighty-eight million, five hundred eighty-one thousand, six hundred seventy-three".