669136 has 20 divisors (see below), whose sum is σ = 1396612. Its totient is φ = 308736.

The previous prime is 669133. The next prime is 669167. The reversal of 669136 is 631966.

It can be written as a sum of positive squares in 2 ways, for example, as 360000 + 309136 = 600^2 + 556^2 .

It is a junction number, because it is equal to n+sod(n) for n = 669098 and 669107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1401 + ... + 1816.

2⁶⁶⁹¹³⁶ is an apocalyptic number.

It is an amenable number.

669136 is an abundant number, since it is smaller than the sum of its proper divisors (727476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669136 is a wasteful number, since it uses less digits than its factorization.

669136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3238 (or 3232 counting only the distinct ones).

The product of its digits is 5832, while the sum is 31.

The square root of 669136 is about 818.0073349304. The cubic root of 669136 is about 87.4657716463.

The spelling of 669136 in words is "six hundred sixty-nine thousand, one hundred thirty-six".