333661 has 8 divisors (see below), whose sum is σ = 354240. Its totient is φ = 313632.

The previous prime is 333647. The next prime is 333667. The reversal of 333661 is 166333.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 333661 - 2⁷ = 333533 is a prime.

It is a super-2 number, since 2×333661² = 222659325842, which contains 22 as substring.

It is a Duffinian number.

333661 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 333661.

It is not an unprimeable number, because it can be changed into a prime (333667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1966 + ... + 2128.

It is an arithmetic number, because the mean of its divisors is an integer number (44280).

2³³³⁶⁶¹ is an apocalyptic number.

It is an amenable number.

333661 is a deficient number, since it is larger than the sum of its proper divisors (20579).

333661 is a wasteful number, since it uses less digits than its factorization.

333661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275.

The product of its digits is 972, while the sum is 22.

The square root of 333661 is about 577.6339671453. The cubic root of 333661 is about 69.3588391326.

Adding to 333661 its reverse (166333), we get a palindrome (499994).

The spelling of 333661 in words is "three hundred thirty-three thousand, six hundred sixty-one".