6556615655 has 16 divisors (see below), whose sum is σ = 8337772800. Its totient is φ = 4940893440.

The previous prime is 6556615651. The next prime is 6556615679. The reversal of 6556615655 is 5565166556.

It is not a de Polignac number, because 6556615655 - 2² = 6556615651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6556615651) 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, 545495 + ... + 557384.

It is an arithmetic number, because the mean of its divisors is an integer number (521110800).

Almost surely, 2^6556615655 is an apocalyptic number.

6556615655 is a deficient number, since it is larger than the sum of its proper divisors (1781157145).

6556615655 is a wasteful number, since it uses less digits than its factorization.

6556615655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102954.

The product of its digits is 4050000, while the sum is 50.

The square root of 6556615655 is about 80972.9316191528. The cubic root of 6556615655 is about 1871.6583471354.

The spelling of 6556615655 in words is "six billion, five hundred fifty-six million, six hundred fifteen thousand, six hundred fifty-five".