1668662603 has 12 divisors (see below), whose sum is σ = 1710303000. Its totient is φ = 1627941216.

The previous prime is 1668662587. The next prime is 1668662609. The reversal of 1668662603 is 3062668661.

It is not a de Polignac number, because 1668662603 - 2⁴ = 1668662587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668662609) 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 11 ways as a sum of consecutive naturals, for example, 475148 + ... + 478646.

It is an arithmetic number, because the mean of its divisors is an integer number (142525250).

Almost surely, 2^1668662603 is an apocalyptic number.

1668662603 is a deficient number, since it is larger than the sum of its proper divisors (41640397).

1668662603 is an equidigital number, since it uses as much as digits as its factorization.

1668662603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3754 (or 3695 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 1668662603 is about 40849.2668600062. The cubic root of 1668662603 is about 1186.1042015301.

The spelling of 1668662603 in words is "one billion, six hundred sixty-eight million, six hundred sixty-two thousand, six hundred three".