650663 has 4 divisors (see below), whose sum is σ = 700728. Its totient is φ = 600600.

The previous prime is 650627. The next prime is 650669. The reversal of 650663 is 366056.

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

It is not a de Polignac number, because 650663 - 2⁶ = 650599 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25013 + ... + 25038.

It is an arithmetic number, because the mean of its divisors is an integer number (175182).

2⁶⁵⁰⁶⁶³ is an apocalyptic number.

650663 is a deficient number, since it is larger than the sum of its proper divisors (50065).

650663 is a wasteful number, since it uses less digits than its factorization.

650663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50064.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 650663 is about 806.6368451788. The cubic root of 650663 is about 86.6533526556.

The spelling of 650663 in words is "six hundred fifty thousand, six hundred sixty-three".