55565681366 has 24 divisors (see below), whose sum is σ = 90267445224. Its totient is φ = 25641632640.

The previous prime is 55565681363. The next prime is 55565681371. The reversal of 55565681366 is 66318656555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55565681363) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3605870 + ... + 3621246.

It is an arithmetic number, because the mean of its divisors is an integer number (3761143551).

Almost surely, 2^55565681366 is an apocalyptic number.

55565681366 is a deficient number, since it is larger than the sum of its proper divisors (34701763858).

55565681366 is a wasteful number, since it uses less digits than its factorization.

55565681366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26096 (or 26083 counting only the distinct ones).

The product of its digits is 19440000, while the sum is 56.

The spelling of 55565681366 in words is "fifty-five billion, five hundred sixty-five million, six hundred eighty-one thousand, three hundred sixty-six".