66106 has 4 divisors (see below), whose sum is σ = 99162. Its totient is φ = 33052.

The previous prime is 66103. The next prime is 66107. The reversal of 66106 is 60166.

It is a happy number.

66106 is nontrivially palindromic in base 3.

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

It can be written as a sum of positive squares in only one way, i.e., 46225 + 19881 = 215^2 + 141^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (66103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16525 + ... + 16528.

2⁶⁶¹⁰⁶ is an apocalyptic number.

66106 is a deficient number, since it is larger than the sum of its proper divisors (33056).

66106 is a wasteful number, since it uses less digits than its factorization.

66106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33055.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 66106 is about 257.1108710265. The cubic root of 66106 is about 40.4340235555.

It can be divided in two parts, 66 and 106, that multiplied together give a palindrome (6996).

The spelling of 66106 in words is "sixty-six thousand, one hundred six".