1668414 has 32 divisors (see below), whose sum is σ = 3856896. Its totient is φ = 475520.

The previous prime is 1668379. The next prime is 1668427. The reversal of 1668414 is 4148661.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 379 + ... + 1865.

It is an arithmetic number, because the mean of its divisors is an integer number (120528).

2^1668414 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1668414, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1928448).

1668414 is an abundant number, since it is smaller than the sum of its proper divisors (2188482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1668414 is a wasteful number, since it uses less digits than its factorization.

1668414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520.

The product of its digits is 4608, while the sum is 30.

The square root of 1668414 is about 1291.6710107454. The cubic root of 1668414 is about 118.6045295332.

The spelling of 1668414 in words is "one million, six hundred sixty-eight thousand, four hundred fourteen".