660330643 has 8 divisors (see below), whose sum is σ = 799055712. Its totient is φ = 532703616.

The previous prime is 660330641. The next prime is 660330647. The reversal of 660330643 is 346033066.

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 660330643 - 2¹ = 660330641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660330641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2774380 + ... + 2774617.

It is an arithmetic number, because the mean of its divisors is an integer number (99881964).

Almost surely, 2^660330643 is an apocalyptic number.

660330643 is a deficient number, since it is larger than the sum of its proper divisors (138725069).

660330643 is a wasteful number, since it uses less digits than its factorization.

660330643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5549021.

The product of its (nonzero) digits is 23328, while the sum is 31.

The square root of 660330643 is about 25696.8994822333. The cubic root of 660330643 is about 870.8041373839.

The spelling of 660330643 in words is "six hundred sixty million, three hundred thirty thousand, six hundred forty-three".