330661 has 2 divisors, whose sum is σ = 330662. Its totient is φ = 330660.

The previous prime is 330653. The next prime is 330679. The reversal of 330661 is 166033.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 330625 + 36 = 575^2 + 6^2 .

It is a cyclic number.

It is not a de Polignac number, because 330661 - 2³ = 330653 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (330611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165330 + 165331.

It is an arithmetic number, because the mean of its divisors is an integer number (165331).

2³³⁰⁶⁶¹ is an apocalyptic number.

It is an amenable number.

330661 is a deficient number, since it is larger than the sum of its proper divisors (1).

330661 is an equidigital number, since it uses as much as digits as its factorization.

330661 is an odious number, because the sum of its binary digits is odd.

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

The square root of 330661 is about 575.0313034957. The cubic root of 330661 is about 69.1503408187.

Adding to 330661 its reverse (166033), we get a palindrome (496694).

It can be divided in two parts, 330 and 661, that multiplied together give a triangular number (218130 = T₆₆₀).

The spelling of 330661 in words is "three hundred thirty thousand, six hundred sixty-one".