1668916 has 24 divisors (see below), whose sum is σ = 3094784. Its totient is φ = 786240.

The previous prime is 1668913. The next prime is 1668929. The reversal of 1668916 is 6198661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668911) 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, 5176 + ... + 5488.

2^1668916 is an apocalyptic number.

It is an amenable number.

1668916 is a deficient number, since it is larger than the sum of its proper divisors (1425868).

1668916 is a wasteful number, since it uses less digits than its factorization.

1668916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 389 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The square root of 1668916 is about 1291.8653180576. The cubic root of 1668916 is about 118.6164237640.

The spelling of 1668916 in words is "one million, six hundred sixty-eight thousand, nine hundred sixteen".