1668028603 has 2 divisors, whose sum is σ = 1668028604. Its totient is φ = 1668028602.

The previous prime is 1668028553. The next prime is 1668028643. The reversal of 1668028603 is 3068208661.

It is an a-pointer prime, because the next prime (1668028643) can be obtained adding 1668028603 to its sum of digits (40).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1668028603 - 2⁹ = 1668028091 is a prime.

It is a super-2 number, since 2×1668028603² = 5564638840852263218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1668028643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834014301 + 834014302.

It is an arithmetic number, because the mean of its divisors is an integer number (834014302).

Almost surely, 2^1668028603 is an apocalyptic number.

1668028603 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668028603 is an equidigital number, since it uses as much as digits as its factorization.

1668028603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 1668028603 is about 40841.5058855572. The cubic root of 1668028603 is about 1185.9539643839.

The spelling of 1668028603 in words is "one billion, six hundred sixty-eight million, twenty-eight thousand, six hundred three".