67678488487591 has 2 divisors, whose sum is σ = 67678488487592. Its totient is φ = 67678488487590.

The previous prime is 67678488487543. The next prime is 67678488487681. The reversal of 67678488487591 is 19578488487676.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67678488487591 - 2²⁹ = 67677951616679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67678488487091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33839244243795 + 33839244243796.

It is an arithmetic number, because the mean of its divisors is an integer number (33839244243796).

Almost surely, 2^{67678488487591} is an apocalyptic number.

67678488487591 is a deficient number, since it is larger than the sum of its proper divisors (1).

67678488487591 is an equidigital number, since it uses as much as digits as its factorization.

67678488487591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36415733760, while the sum is 88.

The spelling of 67678488487591 in words is "sixty-seven trillion, six hundred seventy-eight billion, four hundred eighty-eight million, four hundred eighty-seven thousand, five hundred ninety-one".