660163 has 4 divisors (see below), whose sum is σ = 754480. Its totient is φ = 565848.

The previous prime is 660157. The next prime is 660167. The reversal of 660163 is 361066.

660163 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 361066 = 2 ⋅180533.

It is a cyclic number.

It is not a de Polignac number, because 660163 - 2⁵ = 660131 is a prime.

It is an Ulam number.

It is a Duffinian number.

660163 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (660167) 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, 47148 + ... + 47161.

It is an arithmetic number, because the mean of its divisors is an integer number (188620).

2⁶⁶⁰¹⁶³ is an apocalyptic number.

660163 is a deficient number, since it is larger than the sum of its proper divisors (94317).

660163 is an equidigital number, since it uses as much as digits as its factorization.

660163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94316.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 660163 is about 812.5041538355. The cubic root of 660163 is about 87.0730438662.

The spelling of 660163 in words is "six hundred sixty thousand, one hundred sixty-three".