66000443 has 8 divisors (see below), whose sum is σ = 70563168. Its totient is φ = 61513344.

The previous prime is 66000421. The next prime is 66000469. The reversal of 66000443 is 34400066.

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

It is not a de Polignac number, because 66000443 - 2¹⁶ = 65934907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66000043) 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, 17096 + ... + 20597.

It is an arithmetic number, because the mean of its divisors is an integer number (8820396).

Almost surely, 2^66000443 is an apocalyptic number.

66000443 is a deficient number, since it is larger than the sum of its proper divisors (4562725).

66000443 is a wasteful number, since it uses less digits than its factorization.

66000443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37813.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 66000443 is about 8124.0656693555. The cubic root of 66000443 is about 404.1249062366.

The spelling of 66000443 in words is "sixty-six million, four hundred forty-three", and thus it is an aban number.