2066618 has 4 divisors (see below), whose sum is σ = 3099930. Its totient is φ = 1033308.

The previous prime is 2066609. The next prime is 2066641. The reversal of 2066618 is 8166602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1857769 + 208849 = 1363^2 + 457^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 516653 + ... + 516656.

2^2066618 is an apocalyptic number.

2066618 is a deficient number, since it is larger than the sum of its proper divisors (1033312).

2066618 is a wasteful number, since it uses less digits than its factorization.

2066618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033311.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 2066618 is about 1437.5736502872. The cubic root of 2066618 is about 127.3757446387.

The spelling of 2066618 in words is "two million, sixty-six thousand, six hundred eighteen".