1663430003 has 4 divisors (see below), whose sum is σ = 1667185368. Its totient is φ = 1659674640.

The previous prime is 1663429997. The next prime is 1663430071. The reversal of 1663430003 is 3000343661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3000343661 = 7 ⋅428620523.

It is a cyclic number.

It is not a de Polignac number, because 1663430003 - 2⁶ = 1663429939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1663433003) 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, 1877018 + ... + 1877903.

It is an arithmetic number, because the mean of its divisors is an integer number (416796342).

Almost surely, 2^1663430003 is an apocalyptic number.

1663430003 is a deficient number, since it is larger than the sum of its proper divisors (3755365).

1663430003 is an equidigital number, since it uses as much as digits as its factorization.

1663430003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3755364.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 1663430003 is about 40785.1689097888. The cubic root of 1663430003 is about 1184.8631063119.

Adding to 1663430003 its reverse (3000343661), we get a palindrome (4663773664).

The spelling of 1663430003 in words is "one billion, six hundred sixty-three million, four hundred thirty thousand, three".