3666336449 has 4 divisors (see below), whose sum is σ = 3672318036. Its totient is φ = 3660354864.

The previous prime is 3666336403. The next prime is 3666336491. The reversal of 3666336449 is 9446336663.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1344542224 + 2321794225 = 36668^2 + 48185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3666336449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3666336397 and 3666336406.

It is not an unprimeable number, because it can be changed into a prime (3666336749) 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 in 3 ways as a sum of consecutive naturals, for example, 2989874 + ... + 2991099.

It is an arithmetic number, because the mean of its divisors is an integer number (918079509).

Almost surely, 2^3666336449 is an apocalyptic number.

It is an amenable number.

3666336449 is a deficient number, since it is larger than the sum of its proper divisors (5981587).

3666336449 is an equidigital number, since it uses as much as digits as its factorization.

3666336449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5981586.

The product of its digits is 5038848, while the sum is 50.

The square root of 3666336449 is about 60550.2803379142. The cubic root of 3666336449 is about 1541.9753771744.

The spelling of 3666336449 in words is "three billion, six hundred sixty-six million, three hundred thirty-six thousand, four hundred forty-nine".