3000661 has 4 divisors (see below), whose sum is σ = 3028300. Its totient is φ = 2973024.

The previous prime is 3000643. The next prime is 3000671. The reversal of 3000661 is 1660003.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1660003 = 421 ⋅3943.

It can be written as a sum of positive squares in 2 ways, for example, as 1575025 + 1425636 = 1255^2 + 1194^2 .

It is a cyclic number.

It is not a de Polignac number, because 3000661 - 2¹⁵ = 2967893 is a prime.

It is a Duffinian number.

3000661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3000611) 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, 13656 + ... + 13873.

It is an arithmetic number, because the mean of its divisors is an integer number (757075).

Almost surely, 2^3000661 is an apocalyptic number.

It is an amenable number.

3000661 is a deficient number, since it is larger than the sum of its proper divisors (27639).

3000661 is a wasteful number, since it uses less digits than its factorization.

3000661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27638.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 3000661 is about 1732.2416113233. The cubic root of 3000661 is about 144.2355487747.

Adding to 3000661 its reverse (1660003), we get a palindrome (4660664).

The spelling of 3000661 in words is "three million, six hundred sixty-one", and thus it is an aban number.