6625023521 has 2 divisors, whose sum is σ = 6625023522. Its totient is φ = 6625023520.

The previous prime is 6625023511. The next prime is 6625023529. The reversal of 6625023521 is 1253205266.

6625023521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5581733521 + 1043290000 = 74711^2 + 32300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6625023521 is a prime.

It is not a weakly prime, because it can be changed into another prime (6625023529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3312511760 + 3312511761.

It is an arithmetic number, because the mean of its divisors is an integer number (3312511761).

Almost surely, 2^6625023521 is an apocalyptic number.

It is an amenable number.

6625023521 is a deficient number, since it is larger than the sum of its proper divisors (1).

6625023521 is an equidigital number, since it uses as much as digits as its factorization.

6625023521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 6625023521 is about 81394.2474687247. The cubic root of 6625023521 is about 1878.1450997896.

Adding to 6625023521 its reverse (1253205266), we get a palindrome (7878228787).

The spelling of 6625023521 in words is "six billion, six hundred twenty-five million, twenty-three thousand, five hundred twenty-one".