669517333 has 2 divisors, whose sum is σ = 669517334. Its totient is φ = 669517332.

The previous prime is 669517319. The next prime is 669517367. The reversal of 669517333 is 333715966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 663938289 + 5579044 = 25767^2 + 2362^2 .

It is a cyclic number.

It is not a de Polignac number, because 669517333 - 2⁵ = 669517301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 669517333.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669517313) 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, 334758666 + 334758667.

It is an arithmetic number, because the mean of its divisors is an integer number (334758667).

Almost surely, 2^669517333 is an apocalyptic number.

It is an amenable number.

669517333 is a deficient number, since it is larger than the sum of its proper divisors (1).

669517333 is an equidigital number, since it uses as much as digits as its factorization.

669517333 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 306180, while the sum is 43.

The square root of 669517333 is about 25875.0330048099. The cubic root of 669517333 is about 874.8238374065.

The spelling of 669517333 in words is "six hundred sixty-nine million, five hundred seventeen thousand, three hundred thirty-three".