850166689 has 2 divisors, whose sum is σ = 850166690. Its totient is φ = 850166688.

The previous prime is 850166671. The next prime is 850166701. The reversal of 850166689 is 986661058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 553190400 + 296976289 = 23520^2 + 17233^2 .

It is a cyclic number.

It is not a de Polignac number, because 850166689 - 2⁵ = 850166657 is a prime.

It is not a weakly prime, because it can be changed into another prime (850166659) 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, 425083344 + 425083345.

It is an arithmetic number, because the mean of its divisors is an integer number (425083345).

Almost surely, 2^850166689 is an apocalyptic number.

It is an amenable number.

850166689 is a deficient number, since it is larger than the sum of its proper divisors (1).

850166689 is an equidigital number, since it uses as much as digits as its factorization.

850166689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 850166689 is about 29157.6180268553. The cubic root of 850166689 is about 947.3301543917.

The spelling of 850166689 in words is "eight hundred fifty million, one hundred sixty-six thousand, six hundred eighty-nine".