668463 has 8 divisors (see below), whose sum is σ = 897408. Its totient is φ = 442584.

The previous prime is 668417. The next prime is 668471. The reversal of 668463 is 364866.

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

It is not a de Polignac number, because 668463 - 2¹³ = 660271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668963) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 195 + ... + 1172.

It is an arithmetic number, because the mean of its divisors is an integer number (112176).

2⁶⁶⁸⁴⁶³ is an apocalyptic number.

668463 is a deficient number, since it is larger than the sum of its proper divisors (228945).

668463 is a wasteful number, since it uses less digits than its factorization.

668463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533.

The product of its digits is 20736, while the sum is 33.

The square root of 668463 is about 817.5958659387. The cubic root of 668463 is about 87.4364381923.

The spelling of 668463 in words is "six hundred sixty-eight thousand, four hundred sixty-three".