43481666 has 4 divisors (see below), whose sum is σ = 65222502. Its totient is φ = 21740832.

The previous prime is 43481663. The next prime is 43481681. The reversal of 43481666 is 66618434.

43481666 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.

It can be written as a sum of positive squares in only one way, i.e., 32821441 + 10660225 = 5729^2 + 3265^2 .

It is not an unprimeable number, because it can be changed into a prime (43481663) 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 as a sum of consecutive naturals, namely, 10870415 + ... + 10870418.

Almost surely, 2^43481666 is an apocalyptic number.

43481666 is a deficient number, since it is larger than the sum of its proper divisors (21740836).

43481666 is a wasteful number, since it uses less digits than its factorization.

43481666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21740835.

The product of its digits is 82944, while the sum is 38.

The square root of 43481666 is about 6594.0629357021. The cubic root of 43481666 is about 351.6430664316.

The spelling of 43481666 in words is "forty-three million, four hundred eighty-one thousand, six hundred sixty-six".