1666363313 has 2 divisors, whose sum is σ = 1666363314. Its totient is φ = 1666363312.

The previous prime is 1666363297. The next prime is 1666363319. The reversal of 1666363313 is 3133636661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 964537249 + 701826064 = 31057^2 + 26492^2 .

It is a cyclic number.

It is not a de Polignac number, because 1666363313 - 2⁴ = 1666363297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1666363319) 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, 833181656 + 833181657.

It is an arithmetic number, because the mean of its divisors is an integer number (833181657).

Almost surely, 2^1666363313 is an apocalyptic number.

It is an amenable number.

1666363313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666363313 is an equidigital number, since it uses as much as digits as its factorization.

1666363313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 38.

The square root of 1666363313 is about 40821.1135688384. The cubic root of 1666363313 is about 1185.5591640236.

Adding to 1666363313 its reverse (3133636661), we get a palindrome (4799999974).

The spelling of 1666363313 in words is "one billion, six hundred sixty-six million, three hundred sixty-three thousand, three hundred thirteen".