6599775121 has 3 divisors (see below), whose sum is σ = 6599856361. Its totient is φ = 6599693882.

The previous prime is 6599775107. The next prime is 6599775151. The reversal of 6599775121 is 1215779956.

The square root of 6599775121 is 81239.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 6599775121 - 2⁹ = 6599774609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6599775151) 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 2 ways as a sum of consecutive naturals, for example, 40620 + ... + 121858.

Almost surely, 2^6599775121 is an apocalyptic number.

6599775121 is the 81239-th square number.

6599775121 is the 40620-th centered octagonal number.

It is an amenable number.

6599775121 is a deficient number, since it is larger than the sum of its proper divisors (81240).

6599775121 is an frugal number, since it uses more digits than its factorization.

6599775121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162478 (or 81239 counting only the distinct ones).

The product of its digits is 1190700, while the sum is 52.

The cubic root of 6599775121 is about 1875.7561509351.

The spelling of 6599775121 in words is "six billion, five hundred ninety-nine million, seven hundred seventy-five thousand, one hundred twenty-one".