66489 has 8 divisors (see below), whose sum is σ = 91200. Its totient is φ = 43056.

The previous prime is 66467. The next prime is 66491. The reversal of 66489 is 98466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66489 - 2⁵ = 66457 is a prime.

It is a d-powerful number, because it can be written as 6³ + 6³ + 4⁸ + 8³ + 9 .

66489 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66449) 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, 189 + ... + 410.

It is an arithmetic number, because the mean of its divisors is an integer number (11400).

2⁶⁶⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

66489 is a deficient number, since it is larger than the sum of its proper divisors (24711).

66489 is a wasteful number, since it uses less digits than its factorization.

66489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639.

The product of its digits is 10368, while the sum is 33.

The square root of 66489 is about 257.8546101973. The cubic root of 66489 is about 40.5119611066.

It can be divided in two parts, 66 and 489, that added together give a palindrome (555).

The spelling of 66489 in words is "sixty-six thousand, four hundred eighty-nine".