55606566566 has 8 divisors (see below), whose sum is σ = 84189381480. Its totient is φ = 27543439408.

The previous prime is 55606566557. The next prime is 55606566571. The reversal of 55606566566 is 66566560655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129921671 + ... + 129922098.

It is an arithmetic number, because the mean of its divisors is an integer number (10523672685).

Almost surely, 2^55606566566 is an apocalyptic number.

55606566566 is a deficient number, since it is larger than the sum of its proper divisors (28582814914).

55606566566 is a wasteful number, since it uses less digits than its factorization.

55606566566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259843878.

The product of its (nonzero) digits is 29160000, while the sum is 56.

The spelling of 55606566566 in words is "fifty-five billion, six hundred six million, five hundred sixty-six thousand, five hundred sixty-six".