6560166021 has 8 divisors (see below), whose sum is σ = 8809815840. Its totient is φ = 4341980112.

The previous prime is 6560165999. The next prime is 6560166049. The reversal of 6560166021 is 1206610656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6560166021 - 2³⁰ = 5486424197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6560166121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7865490 + ... + 7866323.

It is an arithmetic number, because the mean of its divisors is an integer number (1101226980).

Almost surely, 2^6560166021 is an apocalyptic number.

It is an amenable number.

6560166021 is a deficient number, since it is larger than the sum of its proper divisors (2249649819).

6560166021 is a wasteful number, since it uses less digits than its factorization.

6560166021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15731955.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 6560166021 is about 80994.8518178779. The cubic root of 6560166021 is about 1871.9961165705.

Adding to 6560166021 its reverse (1206610656), we get a palindrome (7766776677).

The spelling of 6560166021 in words is "six billion, five hundred sixty million, one hundred sixty-six thousand, twenty-one".