660003331 has 8 divisors (see below), whose sum is σ = 741676320. Its totient is φ = 582745152.

The previous prime is 660003317. The next prime is 660003343. The reversal of 660003331 is 133300066.

It is a happy number.

660003331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 660003331 - 2⁷ = 660003203 is a prime.

It is a super-2 number, since 2×660003331² = 871208793862191122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660003371) 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, 1103386 + ... + 1103983.

It is an arithmetic number, because the mean of its divisors is an integer number (92709540).

Almost surely, 2^660003331 is an apocalyptic number.

660003331 is a deficient number, since it is larger than the sum of its proper divisors (81672989).

660003331 is a wasteful number, since it uses less digits than its factorization.

660003331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207405.

The product of its (nonzero) digits is 972, while the sum is 22.

The square root of 660003331 is about 25690.5299867480. The cubic root of 660003331 is about 870.6602338444.

Adding to 660003331 its reverse (133300066), we get a palindrome (793303397).

The spelling of 660003331 in words is "six hundred sixty million, three thousand, three hundred thirty-one".