3216665 has 16 divisors (see below), whose sum is σ = 4088448. Its totient is φ = 2424576.

The previous prime is 3216659. The next prime is 3216667. The reversal of 3216665 is 5666123.

It is a cyclic number.

It is not a de Polignac number, because 3216665 - 2⁴ = 3216649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3216667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9377 + ... + 9713.

It is an arithmetic number, because the mean of its divisors is an integer number (255528).

Almost surely, 2^3216665 is an apocalyptic number.

It is an amenable number.

3216665 is a deficient number, since it is larger than the sum of its proper divisors (871783).

3216665 is a wasteful number, since it uses less digits than its factorization.

3216665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448.

The product of its digits is 6480, while the sum is 29.

The square root of 3216665 is about 1793.5063423362. The cubic root of 3216665 is about 147.6166270931.

The spelling of 3216665 in words is "three million, two hundred sixteen thousand, six hundred sixty-five".