6642004625 has 16 divisors (see below), whose sum is σ = 8305586640. Its totient is φ = 5303113600.

The previous prime is 6642004619. The next prime is 6642004627. The reversal of 6642004625 is 5264002466.

It can be written as a sum of positive squares in 8 ways, for example, as 31013761 + 6610990864 = 5569^2 + 81308^2 .

It is not a de Polignac number, because 6642004625 - 2¹⁰ = 6642003601 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6642004627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11429 + ... + 115821.

It is an arithmetic number, because the mean of its divisors is an integer number (519099165).

Almost surely, 2^6642004625 is an apocalyptic number.

It is an amenable number.

6642004625 is a deficient number, since it is larger than the sum of its proper divisors (1663582015).

6642004625 is a wasteful number, since it uses less digits than its factorization.

6642004625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104917 (or 104907 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 6642004625 is about 81498.4946179989. The cubic root of 6642004625 is about 1879.7484031234.

The spelling of 6642004625 in words is "six billion, six hundred forty-two million, four thousand, six hundred twenty-five".