66066950443 has 16 divisors (see below), whose sum is σ = 71598039520. Its totient is φ = 60601042944.

The previous prime is 66066950441. The next prime is 66066950471. The reversal of 66066950443 is 34405966066.

It is a happy number.

It is not a de Polignac number, because 66066950443 - 2¹ = 66066950441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66066950441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1535755 + ... + 1578187.

It is an arithmetic number, because the mean of its divisors is an integer number (4474877470).

Almost surely, 2^66066950443 is an apocalyptic number.

66066950443 is a deficient number, since it is larger than the sum of its proper divisors (5531089077).

66066950443 is a wasteful number, since it uses less digits than its factorization.

66066950443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43198.

The product of its (nonzero) digits is 2799360, while the sum is 49.

The spelling of 66066950443 in words is "sixty-six billion, sixty-six million, nine hundred fifty thousand, four hundred forty-three".