3965665603 has 2 divisors, whose sum is σ = 3965665604. Its totient is φ = 3965665602.

The previous prime is 3965665601. The next prime is 3965665619. The reversal of 3965665603 is 3065665693.

It is a happy number.

3965665603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3965665603 - 2¹ = 3965665601 is a prime.

Together with 3965665601, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3965665601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1982832801 + 1982832802.

It is an arithmetic number, because the mean of its divisors is an integer number (1982832802).

Almost surely, 2^3965665603 is an apocalyptic number.

3965665603 is a deficient number, since it is larger than the sum of its proper divisors (1).

3965665603 is an equidigital number, since it uses as much as digits as its factorization.

3965665603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2624400, while the sum is 49.

The square root of 3965665603 is about 62973.5309713534. The cubic root of 3965665603 is about 1582.8461229469.

The spelling of 3965665603 in words is "three billion, nine hundred sixty-five million, six hundred sixty-five thousand, six hundred three".