66411 has 12 divisors (see below), whose sum is σ = 98592. Its totient is φ = 43056.

The previous prime is 66403. The next prime is 66413. The reversal of 66411 is 11466.

66411 is a `hidden beast` number, since 664 + 1 + 1 = 666.

66411 is nontrivially palindromic in base 12.

It is not a de Polignac number, because 66411 - 2³ = 66403 is a prime.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (66413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 345 + ... + 501.

It is an arithmetic number, because the mean of its divisors is an integer number (8216).

2⁶⁶⁴¹¹ is an apocalyptic number.

66411 is a deficient number, since it is larger than the sum of its proper divisors (32181).

66411 is a wasteful number, since it uses less digits than its factorization.

66411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 207 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 66411 is about 257.7033177901. The cubic root of 66411 is about 40.4961130243.

Adding to 66411 its reverse (11466), we get a palindrome (77877).

Subtracting from 66411 its reverse (11466), we obtain a palindrome (54945).

The spelling of 66411 in words is "sixty-six thousand, four hundred eleven".