66445089 has 8 divisors (see below), whose sum is σ = 88682880. Its totient is φ = 44252016.

The previous prime is 66445013. The next prime is 66445117. The reversal of 66445089 is 98054466.

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

It is not a de Polignac number, because 66445089 - 2¹² = 66440993 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66445089.

It is not an unprimeable number, because it can be changed into a prime (66445289) 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, 7542 + ... + 13775.

It is an arithmetic number, because the mean of its divisors is an integer number (11085360).

Almost surely, 2^66445089 is an apocalyptic number.

It is an amenable number.

66445089 is a deficient number, since it is larger than the sum of its proper divisors (22237791).

66445089 is a wasteful number, since it uses less digits than its factorization.

66445089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22359.

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 66445089 is about 8151.3857104176. The cubic root of 66445089 is about 405.0304077154.

It can be divided in two parts, 664 and 45089, that added together give a triangular number (45753 = T₃₀₂).

The spelling of 66445089 in words is "sixty-six million, four hundred forty-five thousand, eighty-nine".