663347009 has 8 divisors (see below), whose sum is σ = 714709800. Its totient is φ = 612032256.

The previous prime is 663346969. The next prime is 663347023. The reversal of 663347009 is 900743366.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1056784 + 662290225 = 1028^2 + 25735^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 663347009 - 2²⁴ = 646569793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663347029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19817 + ... + 41465.

It is an arithmetic number, because the mean of its divisors is an integer number (89338725).

Almost surely, 2^663347009 is an apocalyptic number.

It is an amenable number.

663347009 is a deficient number, since it is larger than the sum of its proper divisors (51362791).

663347009 is a wasteful number, since it uses less digits than its factorization.

663347009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24019.

The product of its (nonzero) digits is 81648, while the sum is 38.

The square root of 663347009 is about 25755.5238541172. The cubic root of 663347009 is about 872.1280572706.

The spelling of 663347009 in words is "six hundred sixty-three million, three hundred forty-seven thousand, nine".