1668333349 has 2 divisors, whose sum is σ = 1668333350. Its totient is φ = 1668333348.

The previous prime is 1668333343. The next prime is 1668333353. The reversal of 1668333349 is 9433338661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1175804100 + 492529249 = 34290^2 + 22193^2 .

It is an emirp because it is prime and its reverse (9433338661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1668333349 - 2⁹ = 1668332837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1668333299 and 1668333308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1668333343) 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, 834166674 + 834166675.

It is an arithmetic number, because the mean of its divisors is an integer number (834166675).

Almost surely, 2^1668333349 is an apocalyptic number.

It is an amenable number.

1668333349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668333349 is an equidigital number, since it uses as much as digits as its factorization.

1668333349 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 1668333349 is about 40845.2365521367. The cubic root of 1668333349 is about 1186.0261839127.

The spelling of 1668333349 in words is "one billion, six hundred sixty-eight million, three hundred thirty-three thousand, three hundred forty-nine".