660830 has 8 divisors (see below), whose sum is σ = 1189512. Its totient is φ = 264328.

The previous prime is 660817. The next prime is 660833. The reversal of 660830 is 38066.

Added to its reverse (38066) it gives a square (698896 = 836²).

660830 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 junction number, because it is equal to n+sod(n) for n = 660796 and 660805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660833) 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, 33032 + ... + 33051.

It is an arithmetic number, because the mean of its divisors is an integer number (148689).

2⁶⁶⁰⁸³⁰ is an apocalyptic number.

660830 is a deficient number, since it is larger than the sum of its proper divisors (528682).

660830 is a wasteful number, since it uses less digits than its factorization.

660830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66090.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 660830 is about 812.9145096503. The cubic root of 660830 is about 87.1023589351.

Adding to 660830 its reverse (38066), we get a palindrome (698896).

The spelling of 660830 in words is "six hundred sixty thousand, eight hundred thirty".