67678188497 has 2 divisors, whose sum is σ = 67678188498. Its totient is φ = 67678188496.

The previous prime is 67678188449. The next prime is 67678188659. The reversal of 67678188497 is 79488187676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62519501521 + 5158686976 = 250039^2 + 71824^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67678188497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67678188497.

It is not a weakly prime, because it can be changed into another prime (67678181497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33839094248 + 33839094249.

It is an arithmetic number, because the mean of its divisors is an integer number (33839094249).

Almost surely, 2^67678188497 is an apocalyptic number.

It is an amenable number.

67678188497 is a deficient number, since it is larger than the sum of its proper divisors (1).

67678188497 is an equidigital number, since it uses as much as digits as its factorization.

67678188497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 227598336, while the sum is 71.

The spelling of 67678188497 in words is "sixty-seven billion, six hundred seventy-eight million, one hundred eighty-eight thousand, four hundred ninety-seven".