66016443 has 6 divisors (see below), whose sum is σ = 88040692. Its totient is φ = 44001580.

The previous prime is 66016427. The next prime is 66016451. The reversal of 66016443 is 34461066.

It is not a de Polignac number, because 66016443 - 2⁴ = 66016427 is a prime.

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 66016443.

It is not an unprimeable number, because it can be changed into a prime (66016493) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11728 + ... + 16418.

Almost surely, 2^66016443 is an apocalyptic number.

66016443 is a deficient number, since it is larger than the sum of its proper divisors (22024249).

66016443 is an frugal number, since it uses more digits than its factorization.

66016443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9385 (or 4694 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 66016443 is about 8125.0503383056. The cubic root of 66016443 is about 404.1575599370.

The spelling of 66016443 in words is "sixty-six million, sixteen thousand, four hundred forty-three".