669713 has 8 divisors (see below), whose sum is σ = 738720. Its totient is φ = 602080.

The previous prime is 669707. The next prime is 669733. The reversal of 669713 is 317966.

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 669713 - 2⁶ = 669649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 669713.

It is not an unprimeable number, because it can be changed into a prime (669733) 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 in 7 ways as a sum of consecutive naturals, for example, 893 + ... + 1461.

It is an arithmetic number, because the mean of its divisors is an integer number (92340).

2⁶⁶⁹⁷¹³ is an apocalyptic number.

It is an amenable number.

669713 is a deficient number, since it is larger than the sum of its proper divisors (69007).

669713 is a wasteful number, since it uses less digits than its factorization.

669713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687.

The product of its digits is 6804, while the sum is 32.

The square root of 669713 is about 818.3599452564. The cubic root of 669713 is about 87.4909051772.

It can be divided in two parts, 66 and 9713, that added together give a palindrome (9779).

The spelling of 669713 in words is "six hundred sixty-nine thousand, seven hundred thirteen".