1665530003 has 8 divisors (see below), whose sum is σ = 1707940080. Its totient is φ = 1623205120.

The previous prime is 1665529997. The next prime is 1665530021. The reversal of 1665530003 is 3000355661.

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

It is a cyclic number.

It is not a de Polignac number, because 1665530003 - 2¹⁰ = 1665528979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1665530803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19268 + ... + 60846.

It is an arithmetic number, because the mean of its divisors is an integer number (213492510).

Almost surely, 2^1665530003 is an apocalyptic number.

1665530003 is a deficient number, since it is larger than the sum of its proper divisors (42410077).

1665530003 is an equidigital number, since it uses as much as digits as its factorization.

1665530003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42597.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 1665530003 is about 40810.9054420507. The cubic root of 1665530003 is about 1185.3615074408.

Adding to 1665530003 its reverse (3000355661), we get a palindrome (4665885664).

The spelling of 1665530003 in words is "one billion, six hundred sixty-five million, five hundred thirty thousand, three".