665478003 has 4 divisors (see below), whose sum is σ = 887304008. Its totient is φ = 443652000.

The previous prime is 665477963. The next prime is 665478043. The reversal of 665478003 is 300874566.

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

It is an interprime number because it is at equal distance from previous prime (665477963) and next prime (665478043).

It is not a de Polignac number, because 665478003 - 2¹⁴ = 665461619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665478043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110912998 + ... + 110913003.

It is an arithmetic number, because the mean of its divisors is an integer number (221826002).

Almost surely, 2^665478003 is an apocalyptic number.

665478003 is a deficient number, since it is larger than the sum of its proper divisors (221826005).

665478003 is a wasteful number, since it uses less digits than its factorization.

665478003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221826004.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 665478003 is about 25796.8603322187. The cubic root of 665478003 is about 873.0609591760.

The spelling of 665478003 in words is "six hundred sixty-five million, four hundred seventy-eight thousand, three".