6643142016 has 64 divisors (see below), whose sum is σ = 20166689280. Its totient is φ = 1898039808.

The previous prime is 6643141997. The next prime is 6643142021. The reversal of 6643142016 is 6102413466.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1233016 + ... + 1238391.

It is an arithmetic number, because the mean of its divisors is an integer number (315104520).

Almost surely, 2^6643142016 is an apocalyptic number.

It is an amenable number.

6643142016 is an abundant number, since it is smaller than the sum of its proper divisors (13523547264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6643142016 is a wasteful number, since it uses less digits than its factorization.

6643142016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471431 (or 2471419 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 6643142016 is about 81505.4723070789. The cubic root of 6643142016 is about 1879.8556943710.

The spelling of 6643142016 in words is "six billion, six hundred forty-three million, one hundred forty-two thousand, sixteen".