669597 has 8 divisors (see below), whose sum is σ = 907680. Its totient is φ = 438960.

The previous prime is 669577. The next prime is 669607. The reversal of 669597 is 795966.

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

It is not a de Polignac number, because 669597 - 2¹¹ = 667549 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 669597.

It is not an unprimeable number, because it can be changed into a prime (669527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1647 + ... + 2012.

It is an arithmetic number, because the mean of its divisors is an integer number (113460).

2⁶⁶⁹⁵⁹⁷ is an apocalyptic number.

It is an amenable number.

669597 is a deficient number, since it is larger than the sum of its proper divisors (238083).

669597 is a wasteful number, since it uses less digits than its factorization.

669597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3723.

The product of its digits is 102060, while the sum is 42.

The square root of 669597 is about 818.2890687282. The cubic root of 669597 is about 87.4858534953.

It can be divided in two parts, 66959 and 7, that added together give a palindrome (66966).

The spelling of 669597 in words is "six hundred sixty-nine thousand, five hundred ninety-seven".