66556056205 has 8 divisors (see below), whose sum is σ = 82443631104. Its totient is φ = 51527269200.

The previous prime is 66556056139. The next prime is 66556056211. The reversal of 66556056205 is 50265065566.

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

It is not a de Polignac number, because 66556056205 - 2²³ = 66547667597 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 214696801 + ... + 214697110.

It is an arithmetic number, because the mean of its divisors is an integer number (10305453888).

Almost surely, 2^66556056205 is an apocalyptic number.

It is an amenable number.

66556056205 is a deficient number, since it is larger than the sum of its proper divisors (15887574899).

66556056205 is a wasteful number, since it uses less digits than its factorization.

66556056205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429393947.

The product of its (nonzero) digits is 1620000, while the sum is 46.

The spelling of 66556056205 in words is "sixty-six billion, five hundred fifty-six million, fifty-six thousand, two hundred five".