1666116 has 24 divisors (see below), whose sum is σ = 4319840. Its totient is φ = 555336.

The previous prime is 1666111. The next prime is 1666127. The reversal of 1666116 is 6116661.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1666116.

It is not an unprimeable number, because it can be changed into a prime (1666111) 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, 7606 + ... + 7821.

2^1666116 is an apocalyptic number.

It is an amenable number.

1666116 is an abundant number, since it is smaller than the sum of its proper divisors (2653724).

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

1666116 is a wasteful number, since it uses less digits than its factorization.

1666116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15440 (or 15432 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 1666116 is about 1290.7811588337. The cubic root of 1666116 is about 118.5500509608.

The spelling of 1666116 in words is "one million, six hundred sixty-six thousand, one hundred sixteen".