66068449 has 4 divisors (see below), whose sum is σ = 66092740. Its totient is φ = 66044160.

The previous prime is 66068447. The next prime is 66068459. The reversal of 66068449 is 94486066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28430224 + 37638225 = 5332^2 + 6135^2 .

It is a cyclic number.

It is not a de Polignac number, because 66068449 - 2¹ = 66068447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66068447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7464 + ... + 13705.

It is an arithmetic number, because the mean of its divisors is an integer number (16523185).

Almost surely, 2^66068449 is an apocalyptic number.

It is an amenable number.

66068449 is a deficient number, since it is larger than the sum of its proper divisors (24291).

66068449 is a wasteful number, since it uses less digits than its factorization.

66068449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24290.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 66068449 is about 8128.2500576692. The cubic root of 66068449 is about 404.2636602771.

The spelling of 66068449 in words is "sixty-six million, sixty-eight thousand, four hundred forty-nine".