50556565666 has 8 divisors (see below), whose sum is σ = 75852061740. Its totient is φ = 25272545088.

The previous prime is 50556565649. The next prime is 50556565681. The reversal of 50556565666 is 66656565505.

It can be written as a sum of positive squares in 2 ways, for example, as 45618552225 + 4938013441 = 213585^2 + 70271^2 .

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

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, 2857851 + ... + 2875486.

Almost surely, 2^50556565666 is an apocalyptic number.

50556565666 is a deficient number, since it is larger than the sum of its proper divisors (25295496074).

50556565666 is a wasteful number, since it uses less digits than its factorization.

50556565666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5737748.

The product of its (nonzero) digits is 24300000, while the sum is 55.

The spelling of 50556565666 in words is "fifty billion, five hundred fifty-six million, five hundred sixty-five thousand, six hundred sixty-six".