5166651721747 has 4 divisors (see below), whose sum is σ = 5166656406856. Its totient is φ = 5166647036640.

The previous prime is 5166651721727. The next prime is 5166651721783. The reversal of 5166651721747 is 7471271566615.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5166651721747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5166651721691 and 5166651721700.

It is not an unprimeable number, because it can be changed into a prime (5166651721727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321547 + ... + 3230587.

It is an arithmetic number, because the mean of its divisors is an integer number (1291664101714).

Almost surely, 2^{5166651721747} is an apocalyptic number.

5166651721747 is a deficient number, since it is larger than the sum of its proper divisors (4685109).

5166651721747 is a wasteful number, since it uses less digits than its factorization.

5166651721747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4685108.

The product of its digits is 14817600, while the sum is 58.

The spelling of 5166651721747 in words is "five trillion, one hundred sixty-six billion, six hundred fifty-one million, seven hundred twenty-one thousand, seven hundred forty-seven".