6642626225 has 24 divisors (see below), whose sum is σ = 8436721920. Its totient is φ = 5186617920.

The previous prime is 6642626143. The next prime is 6642626227. The reversal of 6642626225 is 5226262466.

It is not a de Polignac number, because 6642626225 - 2¹⁶ = 6642560689 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6642626227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164384 + ... + 200766.

It is an arithmetic number, because the mean of its divisors is an integer number (351530080).

Almost surely, 2^6642626225 is an apocalyptic number.

It is an amenable number.

6642626225 is a deficient number, since it is larger than the sum of its proper divisors (1794095695).

6642626225 is a wasteful number, since it uses less digits than its factorization.

6642626225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36569 (or 36564 counting only the distinct ones).

The product of its digits is 414720, while the sum is 41.

The square root of 6642626225 is about 81502.3080961515. The cubic root of 6642626225 is about 1879.8070408001.

The spelling of 6642626225 in words is "six billion, six hundred forty-two million, six hundred twenty-six thousand, two hundred twenty-five".