80166703109 has 2 divisors, whose sum is σ = 80166703110. Its totient is φ = 80166703108.

The previous prime is 80166703073. The next prime is 80166703121. The reversal of 80166703109 is 90130766108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77467588900 + 2699114209 = 278330^2 + 51953^2 .

It is a cyclic number.

It is not a de Polignac number, because 80166703109 - 2²⁰ = 80165654533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80166703009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40083351554 + 40083351555.

It is an arithmetic number, because the mean of its divisors is an integer number (40083351555).

Almost surely, 2^80166703109 is an apocalyptic number.

It is an amenable number.

80166703109 is a deficient number, since it is larger than the sum of its proper divisors (1).

80166703109 is an equidigital number, since it uses as much as digits as its factorization.

80166703109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 80166703109 in words is "eighty billion, one hundred sixty-six million, seven hundred three thousand, one hundred nine".