2066538 has 8 divisors (see below), whose sum is σ = 4133088. Its totient is φ = 688844.

The previous prime is 2066521. The next prime is 2066539. The reversal of 2066538 is 8356602.

It is a sphenic number, since it is the product of 3 distinct primes.

2066538 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2066539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172206 + ... + 172217.

It is an arithmetic number, because the mean of its divisors is an integer number (516636).

2^2066538 is an apocalyptic number.

2066538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2066538 is a wasteful number, since it uses less digits than its factorization.

2066538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344428.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 2066538 is about 1437.5458253565. The cubic root of 2066538 is about 127.3741010208.

Subtracting 2066538 from its reverse (8356602), we obtain a square (6290064 = 2508²).

The spelling of 2066538 in words is "two million, sixty-six thousand, five hundred thirty-eight".