2066686 has 4 divisors (see below), whose sum is σ = 3100032. Its totient is φ = 1033342.

The previous prime is 2066683. The next prime is 2066693. The reversal of 2066686 is 6866602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6866602 = 2 ⋅3433301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 516670 + ... + 516673.

It is an arithmetic number, because the mean of its divisors is an integer number (775008).

2^2066686 is an apocalyptic number.

2066686 is a deficient number, since it is larger than the sum of its proper divisors (1033346).

2066686 is a wasteful number, since it uses less digits than its factorization.

2066686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033345.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 2066686 is about 1437.5973010548. The cubic root of 2066686 is about 127.3771416806.

The spelling of 2066686 in words is "two million, sixty-six thousand, six hundred eighty-six".