2666403 has 24 divisors (see below), whose sum is σ = 4193280. Its totient is φ = 1626480.

The previous prime is 2666393. The next prime is 2666423. The reversal of 2666403 is 3046662.

It is not a de Polignac number, because 2666403 - 2⁹ = 2665891 is a prime.

2666403 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2666423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5050 + ... + 5552.

It is an arithmetic number, because the mean of its divisors is an integer number (174720).

2^2666403 is an apocalyptic number.

2666403 is a deficient number, since it is larger than the sum of its proper divisors (1526877).

2666403 is a wasteful number, since it uses less digits than its factorization.

2666403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559 (or 556 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 2666403 is about 1632.9124287603. The cubic root of 2666403 is about 138.6676843131.

The spelling of 2666403 in words is "two million, six hundred sixty-six thousand, four hundred three".