6000661 has 4 divisors (see below), whose sum is σ = 6006924. Its totient is φ = 5994400.

The previous prime is 6000653. The next prime is 6000679. The reversal of 6000661 is 1660006.

It is a happy number.

6000661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1660006 = 2 ⋅830003.

It can be written as a sum of positive squares in 2 ways, for example, as 3261636 + 2739025 = 1806^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 6000661 - 2³ = 6000653 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 (6000611) 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, 1360 + ... + 3721.

It is an arithmetic number, because the mean of its divisors is an integer number (1501731).

Almost surely, 2^6000661 is an apocalyptic number.

It is an amenable number.

6000661 is a deficient number, since it is larger than the sum of its proper divisors (6263).

6000661 is a wasteful number, since it uses less digits than its factorization.

6000661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6262.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 6000661 is about 2449.6246651273. The cubic root of 6000661 is about 181.7187319088.

Adding to 6000661 its reverse (1660006), we get a palindrome (7660667).

The spelling of 6000661 in words is "six million, six hundred sixty-one", and thus it is an aban number.