6566930641 has 4 divisors (see below), whose sum is σ = 6567214500. Its totient is φ = 6566646784.

The previous prime is 6566930633. The next prime is 6566930647. The reversal of 6566930641 is 1460396656.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 314707600 + 6252223041 = 17740^2 + 79071^2 .

It is a cyclic number.

It is not a de Polignac number, because 6566930641 - 2³ = 6566930633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6566930591 and 6566930600.

It is not an unprimeable number, because it can be changed into a prime (6566930647) 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 3 ways as a sum of consecutive naturals, for example, 103816 + ... + 154633.

It is an arithmetic number, because the mean of its divisors is an integer number (1641803625).

Almost surely, 2^6566930641 is an apocalyptic number.

It is an amenable number.

6566930641 is a deficient number, since it is larger than the sum of its proper divisors (283859).

6566930641 is a wasteful number, since it uses less digits than its factorization.

6566930641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283858.

The product of its (nonzero) digits is 699840, while the sum is 46.

The square root of 6566930641 is about 81036.6006258900. The cubic root of 6566930641 is about 1872.6393417649.

The spelling of 6566930641 in words is "six billion, five hundred sixty-six million, nine hundred thirty thousand, six hundred forty-one".