2066545 has 8 divisors (see below), whose sum is σ = 2670696. Its totient is φ = 1526016.

The previous prime is 2066539. The next prime is 2066549. The reversal of 2066545 is 5456602.

2066545 = 1016² + 1017².

It can be written as a sum of positive squares in 4 ways, for example, as 128881 + 1937664 = 359^2 + 1392^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2066545 - 2⁹ = 2066033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2066549) 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 7 ways as a sum of consecutive naturals, for example, 15832 + ... + 15961.

It is an arithmetic number, because the mean of its divisors is an integer number (333837).

2^2066545 is an apocalyptic number.

2066545 is the 1017-th centered square number.

It is an amenable number.

2066545 is a deficient number, since it is larger than the sum of its proper divisors (604151).

2066545 is a wasteful number, since it uses less digits than its factorization.

2066545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31811.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 2066545 is about 1437.5482600595. The cubic root of 2066545 is about 127.3742448391.

The spelling of 2066545 in words is "two million, sixty-six thousand, five hundred forty-five".