663395 has 4 divisors (see below), whose sum is σ = 796080. Its totient is φ = 530712.

The previous prime is 663371. The next prime is 663407. The reversal of 663395 is 593366.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 593366 = 2 ⋅296683.

It is a cyclic number.

It is not a de Polignac number, because 663395 - 2⁶ = 663331 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66335 + ... + 66344.

It is an arithmetic number, because the mean of its divisors is an integer number (199020).

2⁶⁶³³⁹⁵ is an apocalyptic number.

663395 is a deficient number, since it is larger than the sum of its proper divisors (132685).

663395 is a wasteful number, since it uses less digits than its factorization.

663395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132684.

The product of its digits is 14580, while the sum is 32.

The square root of 663395 is about 814.4906383747. The cubic root of 663395 is about 87.2149088640.

The spelling of 663395 in words is "six hundred sixty-three thousand, three hundred ninety-five".