5643066721 has 16 divisors (see below), whose sum is σ = 6005280384. Its totient is φ = 5290789504.

The previous prime is 5643066713. The next prime is 5643066731. The reversal of 5643066721 is 1276603465.

It is a cyclic number.

It is not a de Polignac number, because 5643066721 - 2³ = 5643066713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5643066731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2030685 + ... + 2033461.

It is an arithmetic number, because the mean of its divisors is an integer number (375330024).

Almost surely, 2^5643066721 is an apocalyptic number.

It is an amenable number.

5643066721 is a deficient number, since it is larger than the sum of its proper divisors (362213663).

5643066721 is a wasteful number, since it uses less digits than its factorization.

5643066721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4520.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 5643066721 is about 75120.3482486603. The cubic root of 5643066721 is about 1780.3486588195.

The spelling of 5643066721 in words is "five billion, six hundred forty-three million, sixty-six thousand, seven hundred twenty-one".