43336661 has 4 divisors (see below), whose sum is σ = 43371372. Its totient is φ = 43301952.

The previous prime is 43336637. The next prime is 43336687. The reversal of 43336661 is 16663334.

43336661 is digitally balanced in base 2, 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 an emirpimes, since its reverse is a distinct semiprime: 16663334 = 2 ⋅8331667.

It can be written as a sum of positive squares in 2 ways, for example, as 42706225 + 630436 = 6535^2 + 794^2 .

It is a cyclic number.

It is not a de Polignac number, because 43336661 - 2⁶ = 43336597 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43336691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15410 + ... + 18003.

It is an arithmetic number, because the mean of its divisors is an integer number (10842843).

Almost surely, 2^43336661 is an apocalyptic number.

It is an amenable number.

43336661 is a deficient number, since it is larger than the sum of its proper divisors (34711).

43336661 is a wasteful number, since it uses less digits than its factorization.

43336661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34710.

The product of its digits is 23328, while the sum is 32.

The square root of 43336661 is about 6583.0586356192. The cubic root of 43336661 is about 351.2517383601.

Adding to 43336661 its reverse (16663334), we get a palindrome (59999995).

The spelling of 43336661 in words is "forty-three million, three hundred thirty-six thousand, six hundred sixty-one".