6656788625 has 8 divisors (see below), whose sum is σ = 8307672360. Its totient is φ = 5325430800.

The previous prime is 6656788609. The next prime is 6656788637. The reversal of 6656788625 is 5268876566.

It can be written as a sum of positive squares in 4 ways, for example, as 185068816 + 6471719809 = 13604^2 + 80447^2 .

It is not a de Polignac number, because 6656788625 - 2⁴ = 6656788609 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 26627030 + ... + 26627279.

It is an arithmetic number, because the mean of its divisors is an integer number (1038459045).

Almost surely, 2^6656788625 is an apocalyptic number.

It is an amenable number.

6656788625 is a deficient number, since it is larger than the sum of its proper divisors (1650883735).

6656788625 is an equidigital number, since it uses as much as digits as its factorization.

6656788625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53254324 (or 53254314 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 59.

The square root of 6656788625 is about 81589.1452645510. The cubic root of 6656788625 is about 1881.1420389622.

The spelling of 6656788625 in words is "six billion, six hundred fifty-six million, seven hundred eighty-eight thousand, six hundred twenty-five".