55558235666 has 16 divisors (see below), whose sum is σ = 84794326656. Its totient is φ = 27295549776.

The previous prime is 55558235651. The next prime is 55558235693. The reversal of 55558235666 is 66653285555.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 468986 + ... + 575381.

It is an arithmetic number, because the mean of its divisors is an integer number (5299645416).

Almost surely, 2^55558235666 is an apocalyptic number.

55558235666 is a deficient number, since it is larger than the sum of its proper divisors (29236090990).

55558235666 is a wasteful number, since it uses less digits than its factorization.

55558235666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044833.

The product of its digits is 32400000, while the sum is 56.

The spelling of 55558235666 in words is "fifty-five billion, five hundred fifty-eight million, two hundred thirty-five thousand, six hundred sixty-six".