6642003 has 4 divisors (see below), whose sum is σ = 8856008. Its totient is φ = 4428000.

The previous prime is 6641983. The next prime is 6642007. The reversal of 6642003 is 3002466.

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

It is not a de Polignac number, because 6642003 - 2⁹ = 6641491 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6642007) 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, 1106998 + ... + 1107003.

It is an arithmetic number, because the mean of its divisors is an integer number (2214002).

Almost surely, 2^6642003 is an apocalyptic number.

6642003 is a deficient number, since it is larger than the sum of its proper divisors (2214005).

6642003 is a wasteful number, since it uses less digits than its factorization.

6642003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2214004.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 6642003 is about 2577.2083734149. The cubic root of 6642003 is about 187.9748249827.

Adding to 6642003 its reverse (3002466), we get a palindrome (9644469).

The spelling of 6642003 in words is "six million, six hundred forty-two thousand, three".