669065 has 4 divisors (see below), whose sum is σ = 802884. Its totient is φ = 535248.

The previous prime is 669049. The next prime is 669077. The reversal of 669065 is 560966.

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

It can be written as a sum of positive squares in 2 ways, for example, as 109561 + 559504 = 331^2 + 748^2 .

It is a cyclic number.

It is not a de Polignac number, because 669065 - 2⁴ = 669049 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66902 + ... + 66911.

It is an arithmetic number, because the mean of its divisors is an integer number (200721).

2⁶⁶⁹⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

669065 is a deficient number, since it is larger than the sum of its proper divisors (133819).

669065 is a wasteful number, since it uses less digits than its factorization.

669065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133818.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 669065 is about 817.9639356353. The cubic root of 669065 is about 87.4626779606.

The spelling of 669065 in words is "six hundred sixty-nine thousand, sixty-five".