6625223121 has 16 divisors (see below), whose sum is σ = 9671491008. Its totient is φ = 4000785600.

The previous prime is 6625223089. The next prime is 6625223123. The reversal of 6625223121 is 1213225266.

6625223121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6625223121 - 2⁵ = 6625223089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6625223123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353250 + ... + 371531.

It is an arithmetic number, because the mean of its divisors is an integer number (604468188).

Almost surely, 2^6625223121 is an apocalyptic number.

It is an amenable number.

6625223121 is a deficient number, since it is larger than the sum of its proper divisors (3046267887).

6625223121 is a wasteful number, since it uses less digits than its factorization.

6625223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725072.

The product of its digits is 8640, while the sum is 30.

The square root of 6625223121 is about 81395.4735903662. The cubic root of 6625223121 is about 1878.1639613074.

Adding to 6625223121 its reverse (1213225266), we get a palindrome (7838448387).

The spelling of 6625223121 in words is "six billion, six hundred twenty-five million, two hundred twenty-three thousand, one hundred twenty-one".