55666606611 has 48 divisors (see below), whose sum is σ = 95837983488. Its totient is φ = 27920457600.

The previous prime is 55666606547. The next prime is 55666606651. The reversal of 55666606611 is 11660666655.

It is not a de Polignac number, because 55666606611 - 2⁶ = 55666606547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55666606651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51001 + ... + 337541.

It is an arithmetic number, because the mean of its divisors is an integer number (1996624656).

Almost surely, 2^55666606611 is an apocalyptic number.

55666606611 is a deficient number, since it is larger than the sum of its proper divisors (40171376877).

55666606611 is a wasteful number, since it uses less digits than its factorization.

55666606611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286620 (or 286591 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

It can be divided in two parts, 55 and 666606611, that added together give a palindrome (666606666).

The spelling of 55666606611 in words is "fifty-five billion, six hundred sixty-six million, six hundred six thousand, six hundred eleven".