1668863 has 8 divisors (see below), whose sum is σ = 1973280. Its totient is φ = 1380960.

The previous prime is 1668847. The next prime is 1668869. The reversal of 1668863 is 3688661.

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

It is not a de Polignac number, because 1668863 - 2⁴ = 1668847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3908 + ... + 4313.

It is an arithmetic number, because the mean of its divisors is an integer number (246660).

2^1668863 is an apocalyptic number.

1668863 is a deficient number, since it is larger than the sum of its proper divisors (304417).

1668863 is an equidigital number, since it uses as much as digits as its factorization.

1668863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8257.

The product of its digits is 41472, while the sum is 38.

The square root of 1668863 is about 1291.8448049205. The cubic root of 1668863 is about 118.6151681112.

The spelling of 1668863 in words is "one million, six hundred sixty-eight thousand, eight hundred sixty-three".