601663 has 4 divisors (see below), whose sum is σ = 622440. Its totient is φ = 580888.

The previous prime is 601651. The next prime is 601669. The reversal of 601663 is 366106.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 601663 - 2⁵ = 601631 is a prime.

It is a Duffinian number.

601663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (601669) 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, 10345 + ... + 10402.

It is an arithmetic number, because the mean of its divisors is an integer number (155610).

2⁶⁰¹⁶⁶³ is an apocalyptic number.

601663 is a deficient number, since it is larger than the sum of its proper divisors (20777).

601663 is a wasteful number, since it uses less digits than its factorization.

601663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20776.

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

The square root of 601663 is about 775.6693883350. The cubic root of 601663 is about 84.4211184547.

Adding to 601663 its reverse (366106), we get a palindrome (967769).

The spelling of 601663 in words is "six hundred one thousand, six hundred sixty-three".