3665328217 has 2 divisors, whose sum is σ = 3665328218. Its totient is φ = 3665328216.

The previous prime is 3665328193. The next prime is 3665328263. The reversal of 3665328217 is 7128235663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3417454681 + 247873536 = 58459^2 + 15744^2 .

It is an emirp because it is prime and its reverse (7128235663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3665328217 - 2¹¹ = 3665326169 is a prime.

It is not a weakly prime, because it can be changed into another prime (3665322217) 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, 1832664108 + 1832664109.

It is an arithmetic number, because the mean of its divisors is an integer number (1832664109).

Almost surely, 2^3665328217 is an apocalyptic number.

It is an amenable number.

3665328217 is a deficient number, since it is larger than the sum of its proper divisors (1).

3665328217 is an equidigital number, since it uses as much as digits as its factorization.

3665328217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 43.

The square root of 3665328217 is about 60541.9541888103. The cubic root of 3665328217 is about 1541.8340179482.

The spelling of 3665328217 in words is "three billion, six hundred sixty-five million, three hundred twenty-eight thousand, two hundred seventeen".