3320665 has 4 divisors (see below), whose sum is σ = 3984804. Its totient is φ = 2656528.

The previous prime is 3320663. The next prime is 3320683. The reversal of 3320665 is 5660233.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5660233 = 19 ⋅297907.

It can be written as a sum of positive squares in 2 ways, for example, as 1315609 + 2005056 = 1147^2 + 1416^2 .

It is a cyclic number.

It is not a de Polignac number, because 3320665 - 2¹ = 3320663 is a prime.

It is a super-2 number, since 2×3320665² = 22053632084450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3320663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332062 + ... + 332071.

It is an arithmetic number, because the mean of its divisors is an integer number (996201).

Almost surely, 2^3320665 is an apocalyptic number.

It is an amenable number.

3320665 is a deficient number, since it is larger than the sum of its proper divisors (664139).

3320665 is an equidigital number, since it uses as much as digits as its factorization.

3320665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664138.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 3320665 is about 1822.2691897741. The cubic root of 3320665 is about 149.1906782121.

Adding to 3320665 its reverse (5660233), we get a palindrome (8980898).

The spelling of 3320665 in words is "three million, three hundred twenty thousand, six hundred sixty-five".