2066387 has 4 divisors (see below), whose sum is σ = 2069376. Its totient is φ = 2063400.

The previous prime is 2066329. The next prime is 2066399. The reversal of 2066387 is 7836602.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7836602 = 2 ⋅3918301.

It is a cyclic number.

It is not a de Polignac number, because 2066387 - 2¹⁰ = 2065363 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2066287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137 + ... + 2037.

It is an arithmetic number, because the mean of its divisors is an integer number (517344).

2^2066387 is an apocalyptic number.

2066387 is a deficient number, since it is larger than the sum of its proper divisors (2989).

2066387 is a wasteful number, since it uses less digits than its factorization.

2066387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2988.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 2066387 is about 1437.4933043322. The cubic root of 2066387 is about 127.3709985764.

The spelling of 2066387 in words is "two million, sixty-six thousand, three hundred eighty-seven".