433606661 has 2 divisors, whose sum is σ = 433606662. Its totient is φ = 433606660.

The previous prime is 433606643. The next prime is 433606669. The reversal of 433606661 is 166606334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 403246561 + 30360100 = 20081^2 + 5510^2 .

It is a cyclic number.

It is not a de Polignac number, because 433606661 - 2¹⁴ = 433590277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (433606669) 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 as a sum of consecutive naturals, namely, 216803330 + 216803331.

It is an arithmetic number, because the mean of its divisors is an integer number (216803331).

Almost surely, 2^433606661 is an apocalyptic number.

It is an amenable number.

433606661 is a deficient number, since it is larger than the sum of its proper divisors (1).

433606661 is an equidigital number, since it uses as much as digits as its factorization.

433606661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 433606661 is about 20823.2240779376. The cubic root of 433606661 is about 756.8886307185. Note that the first 3 decimals are identical.

The spelling of 433606661 in words is "four hundred thirty-three million, six hundred six thousand, six hundred sixty-one".