65740 has 24 divisors (see below), whose sum is σ = 146160. Its totient is φ = 24768.

The previous prime is 65731. The next prime is 65761. The reversal of 65740 is 4756.

65740 is an esthetic number in base 11, because in such base its adjacent digits differ by 1.

It is an Ulam number.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294 + ... + 466.

It is an arithmetic number, because the mean of its divisors is an integer number (6090).

2⁶⁵⁷⁴⁰ 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 65740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73080).

65740 is an abundant number, since it is smaller than the sum of its proper divisors (80420).

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

65740 is a wasteful number, since it uses less digits than its factorization.

65740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 65740 is about 256.3981279183. The cubic root of 65740 is about 40.3592635815.

The spelling of 65740 in words is "sixty-five thousand, seven hundred forty".