660283009 has 4 divisors (see below), whose sum is σ = 699123204. Its totient is φ = 621442816.

The previous prime is 660283007. The next prime is 660283037. The reversal of 660283009 is 900382066.

It is a happy number.

660283009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900382066 = 2 ⋅450191033.

It can be written as a sum of positive squares in 2 ways, for example, as 213890625 + 446392384 = 14625^2 + 21128^2 .

It is a cyclic number.

It is not a de Polignac number, because 660283009 - 2¹ = 660283007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660283007) 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, 19420072 + ... + 19420105.

It is an arithmetic number, because the mean of its divisors is an integer number (174780801).

Almost surely, 2^660283009 is an apocalyptic number.

It is an amenable number.

660283009 is a deficient number, since it is larger than the sum of its proper divisors (38840195).

660283009 is a wasteful number, since it uses less digits than its factorization.

660283009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38840194.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 660283009 is about 25695.9726221834. The cubic root of 660283009 is about 870.7831979338.

The spelling of 660283009 in words is "six hundred sixty million, two hundred eighty-three thousand, nine".