40660 has 24 divisors (see below), whose sum is σ = 90720. Its totient is φ = 15264.

The previous prime is 40639. The next prime is 40693. The reversal of 40660 is 6604.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

40660 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327 + ... + 433.

It is an arithmetic number, because the mean of its divisors is an integer number (3780).

2⁴⁰⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45360).

40660 is an abundant number, since it is smaller than the sum of its proper divisors (50060).

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

40660 is a wasteful number, since it uses less digits than its factorization.

40660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 40660 is about 201.6432493291. The cubic root of 40660 is about 34.3865911324.

Adding to 40660 its product of nonzero digits (144), we get a palindrome (40804).

The spelling of 40660 in words is "forty thousand, six hundred sixty".