669109 has 8 divisors (see below), whose sum is σ = 777728. Its totient is φ = 563760.

The previous prime is 669107. The next prime is 669113. The reversal of 669109 is 901966.

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

It is a cyclic number.

It is not a de Polignac number, because 669109 - 2¹ = 669107 is a prime.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357 + ... + 1210.

It is an arithmetic number, because the mean of its divisors is an integer number (97216).

2⁶⁶⁹¹⁰⁹ is an apocalyptic number.

It is an amenable number.

669109 is a deficient number, since it is larger than the sum of its proper divisors (108619).

669109 is a wasteful number, since it uses less digits than its factorization.

669109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 669109 is about 817.9908312445. The cubic root of 669109 is about 87.4645952000.

The spelling of 669109 in words is "six hundred sixty-nine thousand, one hundred nine".