1669646323 has 2 divisors, whose sum is σ = 1669646324. Its totient is φ = 1669646322.

The previous prime is 1669646317. The next prime is 1669646339. The reversal of 1669646323 is 3236469661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1669646323 - 2⁹ = 1669645811 is a prime.

It is not a weakly prime, because it can be changed into another prime (1669646393) 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, 834823161 + 834823162.

It is an arithmetic number, because the mean of its divisors is an integer number (834823162).

Almost surely, 2^1669646323 is an apocalyptic number.

1669646323 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669646323 is an equidigital number, since it uses as much as digits as its factorization.

1669646323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 46.

The square root of 1669646323 is about 40861.3059385037. The cubic root of 1669646323 is about 1186.3372355005.

The spelling of 1669646323 in words is "one billion, six hundred sixty-nine million, six hundred forty-six thousand, three hundred twenty-three".