66630 has 16 divisors (see below), whose sum is σ = 159984. Its totient is φ = 17760.

The previous prime is 66629. The next prime is 66643. The reversal of 66630 is 3666.

It is a Curzon number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66597 and 66606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1081 + ... + 1140.

It is an arithmetic number, because the mean of its divisors is an integer number (9999).

2⁶⁶⁶³⁰ is an apocalyptic number.

66630 is an abundant number, since it is smaller than the sum of its proper divisors (93354).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79992).

66630 is a wasteful number, since it uses less digits than its factorization.

66630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231.

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

The square root of 66630 is about 258.1278752866. The cubic root of 66630 is about 40.5405781381.

It can be divided in two parts, 666 and 30, that added together give a palindrome (696).

The spelling of 66630 in words is "sixty-six thousand, six hundred thirty".