66459 has 4 divisors (see below), whose sum is σ = 88616. Its totient is φ = 44304.

The previous prime is 66457. The next prime is 66463. The reversal of 66459 is 95466.

66459 = T₁₁₇ + T₁₁₈ + ... + T₁₂₅.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 66459 - 2¹ = 66457 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 66459.

It is not an unprimeable number, because it can be changed into a prime (66457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11074 + ... + 11079.

It is an arithmetic number, because the mean of its divisors is an integer number (22154).

2⁶⁶⁴⁵⁹ is an apocalyptic number.

66459 is a deficient number, since it is larger than the sum of its proper divisors (22157).

66459 is a wasteful number, since it uses less digits than its factorization.

66459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22156.

The product of its digits is 6480, while the sum is 30.

The square root of 66459 is about 257.7964313174. The cubic root of 66459 is about 40.5058671579.

It can be divided in two parts, 66 and 459, that added together give a palindrome (525).

The spelling of 66459 in words is "sixty-six thousand, four hundred fifty-nine".