66534 has 16 divisors (see below), whose sum is σ = 143472. Its totient is φ = 20448.

The previous prime is 66533. The next prime is 66541. The reversal of 66534 is 43566.

66534 is nontrivially palindromic in base 5.

It is an Ulam number.

It is a d-powerful number, because it can be written as 6 + 6⁶ + 5³ + 3⁹ + 4³ .

It is a Curzon number.

It is a plaindrome in base 9.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 66534.

It is not an unprimeable number, because it can be changed into a prime (66533) 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, 349 + ... + 504.

It is an arithmetic number, because the mean of its divisors is an integer number (8967).

2⁶⁶⁵³⁴ is an apocalyptic number.

66534 is an abundant number, since it is smaller than the sum of its proper divisors (76938).

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 (71736).

66534 is a wasteful number, since it uses less digits than its factorization.

66534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871.

The product of its digits is 2160, while the sum is 24.

The square root of 66534 is about 257.9418539129. The cubic root of 66534 is about 40.5210985937.

It can be divided in two parts, 6 and 6534, that multiplied together give a square (39204 = 198²).

The spelling of 66534 in words is "sixty-six thousand, five hundred thirty-four".