660003329 has 4 divisors (see below), whose sum is σ = 672456276. Its totient is φ = 647550384.

The previous prime is 660003317. The next prime is 660003343. The reversal of 660003329 is 923300066.

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 536015104 + 123988225 = 23152^2 + 11135^2 .

It is a cyclic number.

It is not a de Polignac number, because 660003329 - 2⁴ = 660003313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660003349) 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, 6226394 + ... + 6226499.

It is an arithmetic number, because the mean of its divisors is an integer number (168114069).

Almost surely, 2^660003329 is an apocalyptic number.

It is an amenable number.

660003329 is a deficient number, since it is larger than the sum of its proper divisors (12452947).

660003329 is a wasteful number, since it uses less digits than its factorization.

660003329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12452946.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 660003329 is about 25690.5299478232. The cubic root of 660003329 is about 870.6602329649.

The spelling of 660003329 in words is "six hundred sixty million, three thousand, three hundred twenty-nine".