666360 has 64 divisors (see below), whose sum is σ = 2224800. Its totient is φ = 177408.

The previous prime is 666353. The next prime is 666403. The reversal of 666360 is 63666.

666360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 666360.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 772 + ... + 1388.

2⁶⁶⁶³⁶⁰ is an apocalyptic number.

666360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1112400).

666360 is an abundant number, since it is smaller than the sum of its proper divisors (1558440).

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

666360 is a wasteful number, since it uses less digits than its factorization.

666360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637 (or 627 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 666360 is about 816.3087651128. The cubic root of 666360 is about 87.3446495188.

It can be divided in two parts, 6 and 66360, that added together give a palindrome (66366).

The spelling of 666360 in words is "six hundred sixty-six thousand, three hundred sixty".