664283009 has 4 divisors (see below), whose sum is σ = 715381716. Its totient is φ = 613184304.

The previous prime is 664282937. The next prime is 664283023. The reversal of 664283009 is 900382466.

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 92929600 + 571353409 = 9640^2 + 23903^2 .

It is a cyclic number.

It is not a de Polignac number, because 664283009 - 2⁸ = 664282753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664283069) by changing a digit.

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, 25549334 + ... + 25549359.

It is an arithmetic number, because the mean of its divisors is an integer number (178845429).

Almost surely, 2^664283009 is an apocalyptic number.

It is an amenable number.

664283009 is a deficient number, since it is larger than the sum of its proper divisors (51098707).

664283009 is a wasteful number, since it uses less digits than its factorization.

664283009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51098706.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 664283009 is about 25773.6883080400. The cubic root of 664283009 is about 872.5380629968.

The spelling of 664283009 in words is "six hundred sixty-four million, two hundred eighty-three thousand, nine".