6644111603 has 2 divisors, whose sum is σ = 6644111604. Its totient is φ = 6644111602.

The previous prime is 6644111587. The next prime is 6644111609. The reversal of 6644111603 is 3061114466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6644111603 - 2⁴ = 6644111587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6644111603.

It is not a weakly prime, because it can be changed into another prime (6644111609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3322055801 + 3322055802.

It is an arithmetic number, because the mean of its divisors is an integer number (3322055802).

Almost surely, 2^6644111603 is an apocalyptic number.

6644111603 is a deficient number, since it is larger than the sum of its proper divisors (1).

6644111603 is an equidigital number, since it uses as much as digits as its factorization.

6644111603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 6644111603 is about 81511.4200771892. The cubic root of 6644111603 is about 1879.9471468278.

The spelling of 6644111603 in words is "six billion, six hundred forty-four million, one hundred eleven thousand, six hundred three".