1669999603 has 2 divisors, whose sum is σ = 1669999604. Its totient is φ = 1669999602.

The previous prime is 1669999601. The next prime is 1669999609. The reversal of 1669999603 is 3069999661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1669999603 - 2¹ = 1669999601 is a prime.

Together with 1669999601, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1669999601) 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 as a sum of consecutive naturals, namely, 834999801 + 834999802.

It is an arithmetic number, because the mean of its divisors is an integer number (834999802).

Almost surely, 2^1669999603 is an apocalyptic number.

1669999603 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669999603 is an equidigital number, since it uses as much as digits as its factorization.

1669999603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4251528, while the sum is 58.

The square root of 1669999603 is about 40865.6286260226. The cubic root of 1669999603 is about 1186.4209018548.

Adding to 1669999603 its sum of digits (58), we get a palindrome (1669999661).

The spelling of 1669999603 in words is "one billion, six hundred sixty-nine million, nine hundred ninety-nine thousand, six hundred three".