---
id: 5900f4c31000cf542c50ffd5
challengeType: 5
title: 'Problem 342: The totient of a square is a cube'
forumTopicId: 302001
---
## Description
Consider the number 50.
502 = 2500 = 22 × 54, so φ(2500) = 2 × 4 × 53 = 8 × 53 = 23 × 53. 1
So 2500 is a square and φ(2500) is a cube.
Find the sum of all numbers n, 1 < n < 1010 such that φ(n2) is a cube.
1 φ denotes Euler's totient function.
## Instructions
## Tests
```yml
tests:
- text: euler342() should return 5943040885644.
testString: assert.strictEqual(euler342(), 5943040885644);
```
## Challenge Seed
```js
function euler342() {
// Good luck!
return true;
}
euler342();
```