666330 has 64 divisors (see below), whose sum is σ = 1935360. Its totient is φ = 143424.

The previous prime is 666329. The next prime is 666353. The reversal of 666330 is 33666.

666330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 666330.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3907 + ... + 4073.

It is an arithmetic number, because the mean of its divisors is an integer number (30240).

2⁶⁶⁶³³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (967680).

666330 is an abundant number, since it is smaller than the sum of its proper divisors (1269030).

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

666330 is a wasteful number, since it uses less digits than its factorization.

666330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203.

The product of its (nonzero) digits is 1944, while the sum is 24.

The square root of 666330 is about 816.2903895061. The cubic root of 666330 is about 87.3433387264.

Adding to 666330 its reverse (33666), we get a palindrome (699996).

The spelling of 666330 in words is "six hundred sixty-six thousand, three hundred thirty".