1669041169 has 2 divisors, whose sum is σ = 1669041170. Its totient is φ = 1669041168.

The previous prime is 1669041151. The next prime is 1669041193. The reversal of 1669041169 is 9611409661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 921729600 + 747311569 = 30360^2 + 27337^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1669041169 is a prime.

It is a super-2 number, since 2×1669041169² = 5571396847633773122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1669041109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834520584 + 834520585.

It is an arithmetic number, because the mean of its divisors is an integer number (834520585).

Almost surely, 2^1669041169 is an apocalyptic number.

It is an amenable number.

1669041169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669041169 is an equidigital number, since it uses as much as digits as its factorization.

1669041169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 1669041169 is about 40853.9002911595. The cubic root of 1669041169 is about 1186.1938910756.

The spelling of 1669041169 in words is "one billion, six hundred sixty-nine million, forty-one thousand, one hundred sixty-nine".