1668463 has 4 divisors (see below), whose sum is σ = 1683880. Its totient is φ = 1653048.

The previous prime is 1668449. The next prime is 1668467. The reversal of 1668463 is 3648661.

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 1668463 - 2⁹ = 1667951 is a prime.

It is a Duffinian number.

1668463 is a lucky number.

It is a nialpdrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668467) 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, 7545 + ... + 7762.

It is an arithmetic number, because the mean of its divisors is an integer number (420970).

2^1668463 is an apocalyptic number.

1668463 is a deficient number, since it is larger than the sum of its proper divisors (15417).

1668463 is a wasteful number, since it uses less digits than its factorization.

1668463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15416.

The product of its digits is 20736, while the sum is 34.

The square root of 1668463 is about 1291.6899782843. The cubic root of 1668463 is about 118.6056906290.

The spelling of 1668463 in words is "one million, six hundred sixty-eight thousand, four hundred sixty-three".