6612853221 has 18 divisors (see below), whose sum is σ = 10343183058. Its totient is φ = 4069447200.

The previous prime is 6612853213. The next prime is 6612853229. The reversal of 6612853221 is 1223582166.

6612853221 is a `hidden beast` number, since 6 + 612 + 8 + 5 + 32 + 2 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (6612853213) and next prime (6612853229).

It can be written as a sum of positive squares in 3 ways, for example, as 546156900 + 6066696321 = 23370^2 + 77889^2 .

It is not a de Polignac number, because 6612853221 - 2³ = 6612853213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6612853229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2172330 + ... + 2175371.

It is an arithmetic number, because the mean of its divisors is an integer number (574621281).

Almost surely, 2^6612853221 is an apocalyptic number.

It is an amenable number.

6612853221 is a deficient number, since it is larger than the sum of its proper divisors (3730329837).

6612853221 is a wasteful number, since it uses less digits than its factorization.

6612853221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4347733 (or 4347717 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 6612853221 is about 81319.4516767052. The cubic root of 6612853221 is about 1876.9943315368.

The spelling of 6612853221 in words is "six billion, six hundred twelve million, eight hundred fifty-three thousand, two hundred twenty-one".