669395 has 8 divisors (see below), whose sum is σ = 813456. Its totient is φ = 528736.

The previous prime is 669391. The next prime is 669401. The reversal of 669395 is 593966.

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 669395 - 2² = 669391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669391) 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, 392 + ... + 1221.

It is an arithmetic number, because the mean of its divisors is an integer number (101682).

2⁶⁶⁹³⁹⁵ is an apocalyptic number.

669395 is a deficient number, since it is larger than the sum of its proper divisors (144061).

669395 is a wasteful number, since it uses less digits than its factorization.

669395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701.

The product of its digits is 43740, while the sum is 38.

The square root of 669395 is about 818.1656311530. The cubic root of 669395 is about 87.4770552083.

The spelling of 669395 in words is "six hundred sixty-nine thousand, three hundred ninety-five".