1668018 has 32 divisors (see below), whose sum is σ = 3686400. Its totient is φ = 498960.

The previous prime is 1668011. The next prime is 1668019. The reversal of 1668018 is 8108661.

It is not an unprimeable number, because it can be changed into a prime (1668011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8283 + ... + 8481.

It is an arithmetic number, because the mean of its divisors is an integer number (115200).

2^1668018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1668018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1843200).

1668018 is an abundant number, since it is smaller than the sum of its proper divisors (2018382).

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

1668018 is a wasteful number, since it uses less digits than its factorization.

1668018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1668018 is about 1291.5177118414. The cubic root of 1668018 is about 118.5951451498.

The spelling of 1668018 in words is "one million, six hundred sixty-eight thousand, eighteen".