3003661 has 4 divisors (see below), whose sum is σ = 3037500. Its totient is φ = 2969824.

The previous prime is 3003647. The next prime is 3003673. The reversal of 3003661 is 1663003.

It is a happy number.

3003661 is nontrivially palindromic in base 11.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1663003 = 1031 ⋅1613.

It can be written as a sum of positive squares in 2 ways, for example, as 1771561 + 1232100 = 1331^2 + 1110^2 .

It is a cyclic number.

It is not a de Polignac number, because 3003661 - 2⁹ = 3003149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3003641) 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, 16786 + ... + 16963.

It is an arithmetic number, because the mean of its divisors is an integer number (759375).

Almost surely, 2^3003661 is an apocalyptic number.

It is an amenable number.

3003661 is a deficient number, since it is larger than the sum of its proper divisors (33839).

3003661 is an equidigital number, since it uses as much as digits as its factorization.

3003661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33838.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 3003661 is about 1733.1073250090. The cubic root of 3003661 is about 144.2836006898.

Adding to 3003661 its reverse (1663003), we get a palindrome (4666664).

The spelling of 3003661 in words is "three million, three thousand, six hundred sixty-one".