669106 has 8 divisors (see below), whose sum is σ = 1014300. Its totient is φ = 331008.

The previous prime is 669091. The next prime is 669107. The reversal of 669106 is 601966.

It is a happy number.

669106 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 576081 + 93025 = 759^2 + 305^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669107) 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, 1531 + ... + 1918.

2⁶⁶⁹¹⁰⁶ is an apocalyptic number.

669106 is a deficient number, since it is larger than the sum of its proper divisors (345194).

669106 is a wasteful number, since it uses less digits than its factorization.

669106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3548.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 669106 is about 817.9889974810. The cubic root of 669106 is about 87.4644644818.

The spelling of 669106 in words is "six hundred sixty-nine thousand, one hundred six".