16669643603 has 2 divisors, whose sum is σ = 16669643604. Its totient is φ = 16669643602.

The previous prime is 16669643587. The next prime is 16669643681. The reversal of 16669643603 is 30634696661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16669643603 - 2⁴ = 16669643587 is a prime.

It is not a weakly prime, because it can be changed into another prime (16669643303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8334821801 + 8334821802.

It is an arithmetic number, because the mean of its divisors is an integer number (8334821802).

Almost surely, 2^16669643603 is an apocalyptic number.

16669643603 is a deficient number, since it is larger than the sum of its proper divisors (1).

16669643603 is an equidigital number, since it uses as much as digits as its factorization.

16669643603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2519424, while the sum is 50.

The spelling of 16669643603 in words is "sixteen billion, six hundred sixty-nine million, six hundred forty-three thousand, six hundred three".