55656666111 has 16 divisors (see below), whose sum is σ = 75816367200. Its totient is φ = 36309301248.

The previous prime is 55656666097. The next prime is 55656666167. The reversal of 55656666111 is 11166665655.

It is not a de Polignac number, because 55656666111 - 2¹⁹ = 55656141823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55656666011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1048596 + ... + 1100393.

It is an arithmetic number, because the mean of its divisors is an integer number (4738522950).

Almost surely, 2^55656666111 is an apocalyptic number.

55656666111 is a deficient number, since it is larger than the sum of its proper divisors (20159701089).

55656666111 is a wasteful number, since it uses less digits than its factorization.

55656666111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149178.

The product of its digits is 972000, while the sum is 48.

The spelling of 55656666111 in words is "fifty-five billion, six hundred fifty-six million, six hundred sixty-six thousand, one hundred eleven".