66435443 has 4 divisors (see below), whose sum is σ = 66451968. Its totient is φ = 66418920.

The previous prime is 66435389. The next prime is 66435451. The reversal of 66435443 is 34453466.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 66435443 - 2¹² = 66431347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66435493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2105 + ... + 11717.

It is an arithmetic number, because the mean of its divisors is an integer number (16612992).

Almost surely, 2^66435443 is an apocalyptic number.

66435443 is a deficient number, since it is larger than the sum of its proper divisors (16525).

66435443 is an equidigital number, since it uses as much as digits as its factorization.

66435443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16524.

The product of its digits is 103680, while the sum is 35.

The square root of 66435443 is about 8150.7940104017. The cubic root of 66435443 is about 405.0108070073.

The spelling of 66435443 in words is "sixty-six million, four hundred thirty-five thousand, four hundred forty-three".