6655566425 has 12 divisors (see below), whose sum is σ = 8408619180. Its totient is φ = 5223990720.

The previous prime is 6655566409. The next prime is 6655566427. The reversal of 6655566425 is 5246655566.

It can be written as a sum of positive squares in 6 ways, for example, as 138556441 + 6517009984 = 11771^2 + 80728^2 .

It is not a de Polignac number, because 6655566425 - 2⁴ = 6655566409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6655566427) 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 11 ways as a sum of consecutive naturals, for example, 2510210 + ... + 2512859.

It is an arithmetic number, because the mean of its divisors is an integer number (700718265).

Almost surely, 2^6655566425 is an apocalyptic number.

It is an amenable number.

6655566425 is a deficient number, since it is larger than the sum of its proper divisors (1753052755).

6655566425 is a wasteful number, since it uses less digits than its factorization.

6655566425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5023132 (or 5023127 counting only the distinct ones).

The product of its digits is 6480000, while the sum is 50.

The square root of 6655566425 is about 81581.6549537946. The cubic root of 6655566425 is about 1881.0269047409.

The spelling of 6655566425 in words is "six billion, six hundred fifty-five million, five hundred sixty-six thousand, four hundred twenty-five".