5216716886666 has 4 divisors (see below), whose sum is σ = 7825075330002. Its totient is φ = 2608358443332.

The previous prime is 5216716886657. The next prime is 5216716886671. The reversal of 5216716886666 is 6666886176125.

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

It can be written as a sum of positive squares in only one way, i.e., 4547790828025 + 668926058641 = 2132555^2 + 817879^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5216716886596 and 5216716886605.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1304179221665 + ... + 1304179221668.

Almost surely, 2^{5216716886666} is an apocalyptic number.

5216716886666 is a deficient number, since it is larger than the sum of its proper divisors (2608358443336).

5216716886666 is a wasteful number, since it uses less digits than its factorization.

5216716886666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2608358443335.

The product of its digits is 209018880, while the sum is 68.

The spelling of 5216716886666 in words is "five trillion, two hundred sixteen billion, seven hundred sixteen million, eight hundred eighty-six thousand, six hundred sixty-six".