80668140169 has 2 divisors, whose sum is σ = 80668140170. Its totient is φ = 80668140168.

The previous prime is 80668140127. The next prime is 80668140199. The reversal of 80668140169 is 96104186608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66880683769 + 13787456400 = 258613^2 + 117420^2 .

It is a cyclic number.

It is not a de Polignac number, because 80668140169 - 2²³ = 80659751561 is a prime.

It is a super-3 number, since 3×80668140169³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (80668140109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40334070084 + 40334070085.

It is an arithmetic number, because the mean of its divisors is an integer number (40334070085).

Almost surely, 2^80668140169 is an apocalyptic number.

It is an amenable number.

80668140169 is a deficient number, since it is larger than the sum of its proper divisors (1).

80668140169 is an equidigital number, since it uses as much as digits as its factorization.

80668140169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 49.

The spelling of 80668140169 in words is "eighty billion, six hundred sixty-eight million, one hundred forty thousand, one hundred sixty-nine".