6655200217 has 2 divisors, whose sum is σ = 6655200218. Its totient is φ = 6655200216.

The previous prime is 6655200197. The next prime is 6655200221. The reversal of 6655200217 is 7120025566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6648119296 + 7080921 = 81536^2 + 2661^2 .

It is a cyclic number.

It is not a de Polignac number, because 6655200217 - 2¹¹ = 6655198169 is a prime.

It is not a weakly prime, because it can be changed into another prime (6655200287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3327600108 + 3327600109.

It is an arithmetic number, because the mean of its divisors is an integer number (3327600109).

Almost surely, 2^6655200217 is an apocalyptic number.

It is an amenable number.

6655200217 is a deficient number, since it is larger than the sum of its proper divisors (1).

6655200217 is an equidigital number, since it uses as much as digits as its factorization.

6655200217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 6655200217 is about 81579.4104967669. The cubic root of 6655200217 is about 1880.9924043097.

The spelling of 6655200217 in words is "six billion, six hundred fifty-five million, two hundred thousand, two hundred seventeen".