3665663 has 4 divisors (see below), whose sum is σ = 3679560. Its totient is φ = 3651768.

The previous prime is 3665653. The next prime is 3665677.

3665663 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 3665663 - 2⁸ = 3665407 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6545 + ... + 7082.

It is an arithmetic number, because the mean of its divisors is an integer number (919890).

Almost surely, 2^3665663 is an apocalyptic number.

3665663 is a deficient number, since it is larger than the sum of its proper divisors (13897).

3665663 is a wasteful number, since it uses less digits than its factorization.

3665663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13896.

The product of its digits is 58320, while the sum is 35.

The square root of 3665663 is about 1914.5921236650. The cubic root of 3665663 is about 154.1880959093.

The spelling of 3665663 in words is "three million, six hundred sixty-five thousand, six hundred sixty-three".