660030 has 48 divisors (see below), whose sum is σ = 1846800. Its totient is φ = 150528.

The previous prime is 660029. The next prime is 660047. The reversal of 660030 is 30066.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 659991 and 660009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1246 + ... + 1694.

It is an arithmetic number, because the mean of its divisors is an integer number (38475).

2⁶⁶⁰⁰³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (923400).

660030 is an abundant number, since it is smaller than the sum of its proper divisors (1186770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660030 is a wasteful number, since it uses less digits than its factorization.

660030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 660030 is about 812.4223039774. The cubic root of 660030 is about 87.0671960717.

Adding to 660030 its reverse (30066), we get a palindrome (690096).

The spelling of 660030 in words is "six hundred sixty thousand, thirty".