6663704445 has 24 divisors (see below), whose sum is σ = 11559693600. Its totient is φ = 3551122656.

The previous prime is 6663704429. The next prime is 6663704447. The reversal of 6663704445 is 5444073666.

It is a happy number.

It is not a de Polignac number, because 6663704445 - 2⁴ = 6663704429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6663704445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6663704447) 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 23 ways as a sum of consecutive naturals, for example, 2155 + ... + 115464.

It is an arithmetic number, because the mean of its divisors is an integer number (481653900).

Almost surely, 2^6663704445 is an apocalyptic number.

It is an amenable number.

6663704445 is a deficient number, since it is larger than the sum of its proper divisors (4895989155).

6663704445 is a wasteful number, since it uses less digits than its factorization.

6663704445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118889 (or 118886 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 45.

The square root of 6663704445 is about 81631.5162483216. The cubic root of 6663704445 is about 1881.7932607337.

The spelling of 6663704445 in words is "six billion, six hundred sixty-three million, seven hundred four thousand, four hundred forty-five".