660106 has 4 divisors (see below), whose sum is σ = 990162. Its totient is φ = 330052.

The previous prime is 660103. The next prime is 660119. The reversal of 660106 is 601066.

It is a happy number.

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., 654481 + 5625 = 809^2 + 75^2 .

It is not an unprimeable number, because it can be changed into a prime (660103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165025 + ... + 165028.

2⁶⁶⁰¹⁰⁶ is an apocalyptic number.

660106 is a deficient number, since it is larger than the sum of its proper divisors (330056).

660106 is a wasteful number, since it uses less digits than its factorization.

660106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330055.

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

The square root of 660106 is about 812.4690763346. The cubic root of 660106 is about 87.0705377647.

The spelling of 660106 in words is "six hundred sixty thousand, one hundred six".