6646546289 has 16 divisors (see below), whose sum is σ = 6942188544. Its totient is φ = 6356232000.

The previous prime is 6646546273. The next prime is 6646546303. The reversal of 6646546289 is 9826456466.

It is a cyclic number.

It is not a de Polignac number, because 6646546289 - 2⁴ = 6646546273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6646546229) 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 15 ways as a sum of consecutive naturals, for example, 1917572 + ... + 1921034.

It is an arithmetic number, because the mean of its divisors is an integer number (433886784).

Almost surely, 2^6646546289 is an apocalyptic number.

It is an amenable number.

6646546289 is a deficient number, since it is larger than the sum of its proper divisors (295642255).

6646546289 is a wasteful number, since it uses less digits than its factorization.

6646546289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4208.

The product of its digits is 14929920, while the sum is 56.

The square root of 6646546289 is about 81526.3533404997. The cubic root of 6646546289 is about 1880.1767497358.

The spelling of 6646546289 in words is "six billion, six hundred forty-six million, five hundred forty-six thousand, two hundred eighty-nine".