66740 has 24 divisors (see below), whose sum is σ = 145152. Its totient is φ = 25760.

The previous prime is 66739. The next prime is 66749. The reversal of 66740 is 4766.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905 + ... + 975.

It is an arithmetic number, because the mean of its divisors is an integer number (6048).

2⁶⁶⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

66740 is an abundant number, since it is smaller than the sum of its proper divisors (78412).

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 (72576).

66740 is a wasteful number, since it uses less digits than its factorization.

66740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 66740 is about 258.3408601054. The cubic root of 66740 is about 40.5628754606.

It can be divided in two parts, 667 and 40, that added together give a palindrome (707).

The spelling of 66740 in words is "sixty-six thousand, seven hundred forty".