6617561233 has 2 divisors, whose sum is σ = 6617561234. Its totient is φ = 6617561232.

The previous prime is 6617561207. The next prime is 6617561267. The reversal of 6617561233 is 3321657166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6038533264 + 579027969 = 77708^2 + 24063^2 .

It is a cyclic number.

It is not a de Polignac number, because 6617561233 - 2¹⁷ = 6617430161 is a prime.

It is not a weakly prime, because it can be changed into another prime (6617567233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3308780616 + 3308780617.

It is an arithmetic number, because the mean of its divisors is an integer number (3308780617).

Almost surely, 2^6617561233 is an apocalyptic number.

It is an amenable number.

6617561233 is a deficient number, since it is larger than the sum of its proper divisors (1).

6617561233 is an equidigital number, since it uses as much as digits as its factorization.

6617561233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 40.

The square root of 6617561233 is about 81348.3941636219. The cubic root of 6617561233 is about 1877.4396670689.

The spelling of 6617561233 in words is "six billion, six hundred seventeen million, five hundred sixty-one thousand, two hundred thirty-three".