6643362445 has 32 divisors (see below), whose sum is σ = 8529062400. Its totient is φ = 4952876544.

The previous prime is 6643362377. The next prime is 6643362461. The reversal of 6643362445 is 5442633466.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6643362445 - 2¹³ = 6643354253 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3209871 + ... + 3211939.

It is an arithmetic number, because the mean of its divisors is an integer number (266533200).

Almost surely, 2^6643362445 is an apocalyptic number.

It is an amenable number.

6643362445 is a deficient number, since it is larger than the sum of its proper divisors (1885699955).

6643362445 is a wasteful number, since it uses less digits than its factorization.

6643362445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2629.

The product of its digits is 1244160, while the sum is 43.

The square root of 6643362445 is about 81506.8245302196. The cubic root of 6643362445 is about 1879.8764862457.

The spelling of 6643362445 in words is "six billion, six hundred forty-three million, three hundred sixty-two thousand, four hundred forty-five".