Number of the day: 664269

Properties of the number 664269:

664269 = 3 × 179 × 1237 is a sphenic number and squarefree.
664269 has 3 distinct prime factors, 8 divisors, 17 antidivisors and 440016 totatives.
664269 has a semiprime digit sum 33 in base 10.
664269 = 332135² - 332134² = 110713² - 110710² = 1945² - 1766² = 887² - 350² is the difference of 2 nonnegative squares in 4 ways.
664269 is the sum of 2 positive triangular numbers.
664269 is the difference of 2 positive pentagonal numbers in 2 ways.
664269 = 83² + 88² + 806² is the sum of 3 positive squares.
664269² = 328644² + 577275² is the sum of 2 positive squares in 1 way.
664269² is the sum of 3 positive squares.
664269 is a proper divisor of 359²⁰⁶ - 1.