67771466689 has 2 divisors, whose sum is σ = 67771466690. Its totient is φ = 67771466688.

The previous prime is 67771466669. The next prime is 67771466713. The reversal of 67771466689 is 98666417776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67487207089 + 284259600 = 259783^2 + 16860^2 .

It is a cyclic number.

It is not a de Polignac number, because 67771466689 - 2²³ = 67763078081 is a prime.

It is not a weakly prime, because it can be changed into another prime (67771466639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33885733344 + 33885733345.

It is an arithmetic number, because the mean of its divisors is an integer number (33885733345).

Almost surely, 2^67771466689 is an apocalyptic number.

It is an amenable number.

67771466689 is a deficient number, since it is larger than the sum of its proper divisors (1).

67771466689 is an equidigital number, since it uses as much as digits as its factorization.

67771466689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 128024064, while the sum is 67.

The spelling of 67771466689 in words is "sixty-seven billion, seven hundred seventy-one million, four hundred sixty-six thousand, six hundred eighty-nine".