80166389 has 2 divisors, whose sum is σ = 80166390. Its totient is φ = 80166388.

The previous prime is 80166323. The next prime is 80166397. The reversal of 80166389 is 98366108.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79959364 + 207025 = 8942^2 + 455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80166389 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80166689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40083194 + 40083195.

It is an arithmetic number, because the mean of its divisors is an integer number (40083195).

Almost surely, 2^80166389 is an apocalyptic number.

It is an amenable number.

80166389 is a deficient number, since it is larger than the sum of its proper divisors (1).

80166389 is an equidigital number, since it uses as much as digits as its factorization.

80166389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 80166389 is about 8953.5685064671. The cubic root of 80166389 is about 431.1854596686.

The spelling of 80166389 in words is "eighty million, one hundred sixty-six thousand, three hundred eighty-nine".