1606668 has 48 divisors (see below), whose sum is σ = 4429824. Its totient is φ = 443520.

The previous prime is 1606663. The next prime is 1606669. The reversal of 1606668 is 8666061.

It is a zygodrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1606663) 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, 2296 + ... + 2912.

It is an arithmetic number, because the mean of its divisors is an integer number (92288).

2^1606668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1606668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2214912).

1606668 is an abundant number, since it is smaller than the sum of its proper divisors (2823156).

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

1606668 is a wasteful number, since it uses less digits than its factorization.

1606668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1606668 is about 1267.5440820737. The cubic root of 1606668 is about 117.1229622597.

The spelling of 1606668 in words is "one million, six hundred six thousand, six hundred sixty-eight".