2066521040 has 80 divisors (see below), whose sum is σ = 4946469120. Its totient is φ = 802321920.

The previous prime is 2066521031. The next prime is 2066521099. The reversal of 2066521040 is 401256602.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2127755 + ... + 2128725.

It is an arithmetic number, because the mean of its divisors is an integer number (61830864).

Almost surely, 2^2066521040 is an apocalyptic number.

2066521040 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 2066521040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2473234560).

2066521040 is an abundant number, since it is smaller than the sum of its proper divisors (2879948080).

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

2066521040 is a wasteful number, since it uses less digits than its factorization.

2066521040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740 (or 1734 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 2066521040 is about 45459.0039486129. The cubic root of 2066521040 is about 1273.7375256837.

Adding to 2066521040 its reverse (401256602), we get a palindrome (2467777642).

The spelling of 2066521040 in words is "two billion, sixty-six million, five hundred twenty-one thousand, forty".