660603 has 8 divisors (see below), whose sum is σ = 932688. Its totient is φ = 414464.

The previous prime is 660601. The next prime is 660607. The reversal of 660603 is 306066.

660603 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 660603 - 2¹ = 660601 is a prime.

660603 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 660603.

It is not an unprimeable number, because it can be changed into a prime (660601) 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, 6426 + ... + 6527.

It is an arithmetic number, because the mean of its divisors is an integer number (116586).

2⁶⁶⁰⁶⁰³ is an apocalyptic number.

660603 is a deficient number, since it is larger than the sum of its proper divisors (272085).

660603 is a wasteful number, since it uses less digits than its factorization.

660603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12973.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 660603 is about 812.7748765802. The cubic root of 660603 is about 87.0923843577.

Adding to 660603 its reverse (306066), we get a palindrome (966669).

The spelling of 660603 in words is "six hundred sixty thousand, six hundred three".