2066820 has 144 divisors (see below), whose sum is σ = 7277760. Its totient is φ = 435456.

The previous prime is 2066797. The next prime is 2066833. The reversal of 2066820 is 286602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55842 + ... + 55878.

It is an arithmetic number, because the mean of its divisors is an integer number (50540).

2^2066820 is an apocalyptic number.

2066820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2066820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3638880).

2066820 is an abundant number, since it is smaller than the sum of its proper divisors (5210940).

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

2066820 is a wasteful number, since it uses less digits than its factorization.

2066820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 2066820 is about 1437.6439058404. The cubic root of 2066820 is about 127.3798945852.

The spelling of 2066820 in words is "two million, sixty-six thousand, eight hundred twenty".