3016661 has 4 divisors (see below), whose sum is σ = 3032172. Its totient is φ = 3001152.

The previous prime is 3016639. The next prime is 3016679. The reversal of 3016661 is 1666103.

3016661 is nontrivially palindromic in base 9.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1666103 = 47 ⋅35449.

It can be written as a sum of positive squares in 2 ways, for example, as 1311025 + 1705636 = 1145^2 + 1306^2 .

It is a cyclic number.

It is not a de Polignac number, because 3016661 - 2¹⁰ = 3015637 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 (3016621) 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, 7460 + ... + 7853.

It is an arithmetic number, because the mean of its divisors is an integer number (758043).

Almost surely, 2^3016661 is an apocalyptic number.

It is an amenable number.

3016661 is a deficient number, since it is larger than the sum of its proper divisors (15511).

3016661 is a wasteful number, since it uses less digits than its factorization.

3016661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15510.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 3016661 is about 1736.8537647137. The cubic root of 3016661 is about 144.4914567332.

The spelling of 3016661 in words is "three million, sixteen thousand, six hundred sixty-one".