664050305 has 4 divisors (see below), whose sum is σ = 796860372. Its totient is φ = 531240240.

The previous prime is 664050281. The next prime is 664050313. The reversal of 664050305 is 503050466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 503050466 = 2 ⋅251525233.

It can be written as a sum of positive squares in 2 ways, for example, as 100320256 + 563730049 = 10016^2 + 23743^2 .

It is not a de Polignac number, because 664050305 - 2²⁴ = 647273089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66405026 + ... + 66405035.

It is an arithmetic number, because the mean of its divisors is an integer number (199215093).

Almost surely, 2^664050305 is an apocalyptic number.

It is an amenable number.

664050305 is a deficient number, since it is larger than the sum of its proper divisors (132810067).

664050305 is a wasteful number, since it uses less digits than its factorization.

664050305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132810066.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 664050305 is about 25769.1735412683. The cubic root of 664050305 is about 872.4361652572.

The spelling of 664050305 in words is "six hundred sixty-four million, fifty thousand, three hundred five".