2666003 has 4 divisors (see below), whose sum is σ = 2679600. Its totient is φ = 2652408.

The previous prime is 2665973. The next prime is 2666021. The reversal of 2666003 is 3006662.

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

It is a cyclic number.

It is not a de Polignac number, because 2666003 - 2⁶ = 2665939 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2666003.

It is not an unprimeable number, because it can be changed into a prime (2666303) 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, 6500 + ... + 6897.

It is an arithmetic number, because the mean of its divisors is an integer number (669900).

2^2666003 is an apocalyptic number.

2666003 is a deficient number, since it is larger than the sum of its proper divisors (13597).

2666003 is a wasteful number, since it uses less digits than its factorization.

2666003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13596.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 2666003 is about 1632.7899436241. The cubic root of 2666003 is about 138.6607498965.

The spelling of 2666003 in words is "two million, six hundred sixty-six thousand, three".