6666665650055 has 4 divisors (see below), whose sum is σ = 7999998780072. Its totient is φ = 5333332520040.

The previous prime is 6666665650033. The next prime is 6666665650219. The reversal of 6666665650055 is 5500565666666.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6666665650055 - 2⁸ = 6666665649799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6666665650055.

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, 666666565001 + ... + 666666565010.

It is an arithmetic number, because the mean of its divisors is an integer number (1999999695018).

Almost surely, 2^{6666665650055} is an apocalyptic number.

6666665650055 is a deficient number, since it is larger than the sum of its proper divisors (1333333130017).

6666665650055 is a wasteful number, since it uses less digits than its factorization.

6666665650055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333333130016.

The product of its (nonzero) digits is 174960000, while the sum is 62.

The spelling of 6666665650055 in words is "six trillion, six hundred sixty-six billion, six hundred sixty-five million, six hundred fifty thousand, fifty-five".