6600121 has 4 divisors (see below), whose sum is σ = 7200144. Its totient is φ = 6000100.

The previous prime is 6600119. The next prime is 6600133. The reversal of 6600121 is 1210066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6600121 - 2¹ = 6600119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6600095 and 6600104.

It is not an unprimeable number, because it can be changed into a prime (6600101) 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 3 ways as a sum of consecutive naturals, for example, 299995 + ... + 300016.

It is an arithmetic number, because the mean of its divisors is an integer number (1800036).

Almost surely, 2^6600121 is an apocalyptic number.

It is an amenable number.

6600121 is a deficient number, since it is larger than the sum of its proper divisors (600023).

6600121 is a wasteful number, since it uses less digits than its factorization.

6600121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600022.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 6600121 is about 2569.0700652182. The cubic root of 6600121 is about 187.5788918381.

Adding to 6600121 its reverse (1210066), we get a palindrome (7810187).

The spelling of 6600121 in words is "six million, six hundred thousand, one hundred twenty-one".