669837 has 16 divisors (see below), whose sum is σ = 1032192. Its totient is φ = 378480.

The previous prime is 669791. The next prime is 669839. The reversal of 669837 is 738966.

It is not a de Polignac number, because 669837 - 2¹⁰ = 668813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 669795 and 669804.

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 669837.

It is not an unprimeable number, because it can be changed into a prime (669839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3412 + ... + 3602.

It is an arithmetic number, because the mean of its divisors is an integer number (64512).

2⁶⁶⁹⁸³⁷ is an apocalyptic number.

It is an amenable number.

669837 is a deficient number, since it is larger than the sum of its proper divisors (362355).

669837 is a wasteful number, since it uses less digits than its factorization.

669837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368.

The product of its digits is 54432, while the sum is 39.

The square root of 669837 is about 818.4357030335. The cubic root of 669837 is about 87.4963046058.

The spelling of 669837 in words is "six hundred sixty-nine thousand, eight hundred thirty-seven".