6645003 has 8 divisors (see below), whose sum is σ = 9326400. Its totient is φ = 4196808.

The previous prime is 6644983. The next prime is 6645013. The reversal of 6645003 is 3005466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6645003 - 2¹⁷ = 6513931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6645013) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 58233 + ... + 58346.

It is an arithmetic number, because the mean of its divisors is an integer number (1165800).

Almost surely, 2^6645003 is an apocalyptic number.

6645003 is a deficient number, since it is larger than the sum of its proper divisors (2681397).

6645003 is a wasteful number, since it uses less digits than its factorization.

6645003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116601.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 6645003 is about 2577.7903328238. The cubic root of 6645003 is about 188.0031216473.

The spelling of 6645003 in words is "six million, six hundred forty-five thousand, three".