67171277086489 has 2 divisors, whose sum is σ = 67171277086490. Its totient is φ = 67171277086488.

The previous prime is 67171277086429. The next prime is 67171277086499. The reversal of 67171277086489 is 98468077217176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42202017630864 + 24969259455625 = 6496308^2 + 4996925^2 .

It is a cyclic number.

It is not a de Polignac number, because 67171277086489 - 2¹⁵ = 67171277053721 is a prime.

It is not a weakly prime, because it can be changed into another prime (67171277086429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33585638543244 + 33585638543245.

It is an arithmetic number, because the mean of its divisors is an integer number (33585638543245).

Almost surely, 2^{67171277086489} is an apocalyptic number.

It is an amenable number.

67171277086489 is a deficient number, since it is larger than the sum of its proper divisors (1).

67171277086489 is an equidigital number, since it uses as much as digits as its factorization.

67171277086489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 398297088, while the sum is 73.

The spelling of 67171277086489 in words is "sixty-seven trillion, one hundred seventy-one billion, two hundred seventy-seven million, eighty-six thousand, four hundred eighty-nine".