66140 has 12 divisors (see below), whose sum is σ = 138936. Its totient is φ = 26448.

The previous prime is 66137. The next prime is 66161. The reversal of 66140 is 4166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1634 + ... + 1673.

It is an arithmetic number, because the mean of its divisors is an integer number (11578).

2⁶⁶¹⁴⁰ is an apocalyptic number.

It is an amenable number.

66140 is an abundant number, since it is smaller than the sum of its proper divisors (72796).

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 (69468).

66140 is a wasteful number, since it uses less digits than its factorization.

66140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3316 (or 3314 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 66140 is about 257.1769818627. The cubic root of 66140 is about 40.4409544502.

The spelling of 66140 in words is "sixty-six thousand, one hundred forty".