66662435443 has 16 divisors (see below), whose sum is σ = 67628373120. Its totient is φ = 65704766400.

The previous prime is 66662435407. The next prime is 66662435473. The reversal of 66662435443 is 34453426666.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 66662435443 - 2⁹ = 66662434931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66662435473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15117423 + ... + 15121831.

It is an arithmetic number, because the mean of its divisors is an integer number (4226773320).

Almost surely, 2^66662435443 is an apocalyptic number.

66662435443 is a deficient number, since it is larger than the sum of its proper divisors (965937677).

66662435443 is a wasteful number, since it uses less digits than its factorization.

66662435443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5298.

The product of its digits is 7464960, while the sum is 49.

The spelling of 66662435443 in words is "sixty-six billion, six hundred sixty-two million, four hundred thirty-five thousand, four hundred forty-three".