80665110108389 has 2 divisors, whose sum is σ = 80665110108390. Its totient is φ = 80665110108388.

The previous prime is 80665110108313. The next prime is 80665110108403. The reversal of 80665110108389 is 98380101156608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70018319613025 + 10646790495364 = 8367695^2 + 3262942^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80665110108389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80665110102389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40332555054194 + 40332555054195.

It is an arithmetic number, because the mean of its divisors is an integer number (40332555054195).

Almost surely, 2^{80665110108389} is an apocalyptic number.

It is an amenable number.

80665110108389 is a deficient number, since it is larger than the sum of its proper divisors (1).

80665110108389 is an equidigital number, since it uses as much as digits as its factorization.

80665110108389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2488320, while the sum is 56.

The spelling of 80665110108389 in words is "eighty trillion, six hundred sixty-five billion, one hundred ten million, one hundred eight thousand, three hundred eighty-nine".