55561645733666 has 16 divisors (see below), whose sum is σ = 84017238009408. Its totient is φ = 27556438470000.

The previous prime is 55561645733623. The next prime is 55561645733689. The reversal of 55561645733666 is 66633754616555.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55561645733596 and 55561645733605.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134478185 + ... + 134890716.

It is an arithmetic number, because the mean of its divisors is an integer number (5251077375588).

Almost surely, 2^{55561645733666} is an apocalyptic number.

55561645733666 is a deficient number, since it is larger than the sum of its proper divisors (28455592275742).

55561645733666 is a wasteful number, since it uses less digits than its factorization.

55561645733666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269369737.

The product of its digits is 1224720000, while the sum is 68.

The spelling of 55561645733666 in words is "fifty-five trillion, five hundred sixty-one billion, six hundred forty-five million, seven hundred thirty-three thousand, six hundred sixty-six".