1668814 has 16 divisors (see below), whose sum is σ = 2880000. Its totient is φ = 710424.

The previous prime is 1668803. The next prime is 1668833. The reversal of 1668814 is 4188661.

It is a self number, because there is not a number n which added to its sum of digits gives 1668814.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2487 + ... + 3085.

It is an arithmetic number, because the mean of its divisors is an integer number (180000).

2^1668814 is an apocalyptic number.

1668814 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1668814 is a deficient number, since it is larger than the sum of its proper divisors (1211186).

1668814 is a wasteful number, since it uses less digits than its factorization.

1668814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807.

The product of its digits is 9216, while the sum is 34.

The square root of 1668814 is about 1291.8258396549. The cubic root of 1668814 is about 118.6140072010.

The spelling of 1668814 in words is "one million, six hundred sixty-eight thousand, eight hundred fourteen".