1665846 has 80 divisors (see below), whose sum is σ = 4634784. Its totient is φ = 435456.

The previous prime is 1665841. The next prime is 1665869. The reversal of 1665846 is 6485661.

It is a self number, because there is not a number n which added to its sum of digits gives 1665846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665841) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 14686 + ... + 14798.

2^1665846 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1665846, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2317392).

1665846 is an abundant number, since it is smaller than the sum of its proper divisors (2968938).

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

1665846 is a wasteful number, since it uses less digits than its factorization.

1665846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 138 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 1665846 is about 1290.6765667664. The cubic root of 1665846 is about 118.5436467963.

The spelling of 1665846 in words is "one million, six hundred sixty-five thousand, eight hundred forty-six".