160665709 has 2 divisors, whose sum is σ = 160665710. Its totient is φ = 160665708.

The previous prime is 160665707. The next prime is 160665719. The reversal of 160665709 is 907566061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144841225 + 15824484 = 12035^2 + 3978^2 .

It is an emirp because it is prime and its reverse (907566061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 160665709 - 2¹ = 160665707 is a prime.

Together with 160665707, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (160665707) 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, 80332854 + 80332855.

It is an arithmetic number, because the mean of its divisors is an integer number (80332855).

Almost surely, 2^160665709 is an apocalyptic number.

It is an amenable number.

160665709 is a deficient number, since it is larger than the sum of its proper divisors (1).

160665709 is an equidigital number, since it uses as much as digits as its factorization.

160665709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 160665709 is about 12675.3977846851. The cubic root of 160665709 is about 543.6354032690.

The spelling of 160665709 in words is "one hundred sixty million, six hundred sixty-five thousand, seven hundred nine".