5051666651566 has 4 divisors (see below), whose sum is σ = 7577499977352. Its totient is φ = 2525833325782.

The previous prime is 5051666651543. The next prime is 5051666651573. The reversal of 5051666651566 is 6651566661505.

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

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 5051666651566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1262916662890 + ... + 1262916662893.

It is an arithmetic number, because the mean of its divisors is an integer number (1894374994338).

Almost surely, 2^{5051666651566} is an apocalyptic number.

5051666651566 is a deficient number, since it is larger than the sum of its proper divisors (2525833325786).

5051666651566 is a wasteful number, since it uses less digits than its factorization.

5051666651566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525833325785.

The product of its (nonzero) digits is 29160000, while the sum is 58.

The spelling of 5051666651566 in words is "five trillion, fifty-one billion, six hundred sixty-six million, six hundred fifty-one thousand, five hundred sixty-six".