66443065603 has 8 divisors (see below), whose sum is σ = 67048074000. Its totient is φ = 65838355968.

The previous prime is 66443065571. The next prime is 66443065627. The reversal of 66443065603 is 30656034466.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66443065603 - 2⁵ = 66443065571 is a prime.

It is a super-4 number, since 4×66443065603⁴ (a number of 44 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66443065603.

It is not an unprimeable number, because it can be changed into a prime (66443095603) 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 7 ways as a sum of consecutive naturals, for example, 384928 + ... + 530146.

It is an arithmetic number, because the mean of its divisors is an integer number (8381009250).

Almost surely, 2^66443065603 is an apocalyptic number.

66443065603 is a deficient number, since it is larger than the sum of its proper divisors (605008397).

66443065603 is a wasteful number, since it uses less digits than its factorization.

66443065603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149381.

The product of its (nonzero) digits is 933120, while the sum is 43.

The spelling of 66443065603 in words is "sixty-six billion, four hundred forty-three million, sixty-five thousand, six hundred three".