6648053221 has 2 divisors, whose sum is σ = 6648053222. Its totient is φ = 6648053220.

The previous prime is 6648053213. The next prime is 6648053233. The reversal of 6648053221 is 1223508466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4008662596 + 2639390625 = 63314^2 + 51375^2 .

It is a cyclic number.

It is not a de Polignac number, because 6648053221 - 2³ = 6648053213 is a prime.

It is a super-2 number, since 2×6648053221² = 88393223258496949682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6648053821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3324026610 + 3324026611.

It is an arithmetic number, because the mean of its divisors is an integer number (3324026611).

Almost surely, 2^6648053221 is an apocalyptic number.

It is an amenable number.

6648053221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6648053221 is an equidigital number, since it uses as much as digits as its factorization.

6648053221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 6648053221 is about 81535.5948098743. The cubic root of 6648053221 is about 1880.3188327710.

The spelling of 6648053221 in words is "six billion, six hundred forty-eight million, fifty-three thousand, two hundred twenty-one".