2000666 has 4 divisors (see below), whose sum is σ = 3001002. Its totient is φ = 1000332.

The previous prime is 2000659. The next prime is 2000671. The reversal of 2000666 is 6660002.

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., 1729225 + 271441 = 1315^2 + 521^2 .

2000666 is a modest number, since divided by 666 gives 2 as remainder.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 500165 + ... + 500168.

2^2000666 is an apocalyptic number.

2000666 is a deficient number, since it is larger than the sum of its proper divisors (1000336).

2000666 is a wasteful number, since it uses less digits than its factorization.

2000666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000335.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 2000666 is about 1414.4490093319. The cubic root of 2000666 is about 126.0060885611.

Adding to 2000666 its reverse (6660002), we get a palindrome (8660668).

The spelling of 2000666 in words is "two million, six hundred sixty-six", and thus it is an aban number.