663169 has 8 divisors (see below), whose sum is σ = 721280. Its totient is φ = 606096.

The previous prime is 663167. The next prime is 663191. The reversal of 663169 is 961366.

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

It is a cyclic number.

It is not a de Polignac number, because 663169 - 2¹ = 663167 is a prime.

It is a super-2 number, since 2×663169² = 879586245122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

663169 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 663169.

It is not an unprimeable number, because it can be changed into a prime (663161) 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, 1624 + ... + 1990.

It is an arithmetic number, because the mean of its divisors is an integer number (90160).

2⁶⁶³¹⁶⁹ is an apocalyptic number.

It is an amenable number.

663169 is a deficient number, since it is larger than the sum of its proper divisors (58111).

663169 is a wasteful number, since it uses less digits than its factorization.

663169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519.

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

The square root of 663169 is about 814.3518895416. The cubic root of 663169 is about 87.2050038511.

The spelling of 663169 in words is "six hundred sixty-three thousand, one hundred sixty-nine".