6606959221 has 2 divisors, whose sum is σ = 6606959222. Its totient is φ = 6606959220.

The previous prime is 6606959209. The next prime is 6606959263. The reversal of 6606959221 is 1229596066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6421618225 + 185340996 = 80135^2 + 13614^2 .

It is a cyclic number.

It is not a de Polignac number, because 6606959221 - 2¹⁵ = 6606926453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6606959321) 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 as a sum of consecutive naturals, namely, 3303479610 + 3303479611.

It is an arithmetic number, because the mean of its divisors is an integer number (3303479611).

Almost surely, 2^6606959221 is an apocalyptic number.

It is an amenable number.

6606959221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6606959221 is an equidigital number, since it uses as much as digits as its factorization.

6606959221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 6606959221 is about 81283.2038061985. The cubic root of 6606959221 is about 1876.4365141748.

The spelling of 6606959221 in words is "six billion, six hundred six million, nine hundred fifty-nine thousand, two hundred twenty-one".