16680506751 has 6 divisors (see below), whose sum is σ = 24094065320. Its totient is φ = 11120337828.

The previous prime is 16680506749. The next prime is 16680506813. The reversal of 16680506751 is 15760508661.

16680506751 is a `hidden beast` number, since 1 + 66 + 80 + 506 + 7 + 5 + 1 = 666.

It is not a de Polignac number, because 16680506751 - 2¹ = 16680506749 is a prime.

It is a super-4 number, since 4×16680506751⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16680506697 and 16680506706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16680506741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 926694811 + ... + 926694828.

Almost surely, 2^16680506751 is an apocalyptic number.

16680506751 is a deficient number, since it is larger than the sum of its proper divisors (7413558569).

16680506751 is a wasteful number, since it uses less digits than its factorization.

16680506751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853389645 (or 1853389642 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 16680506751 in words is "sixteen billion, six hundred eighty million, five hundred six thousand, seven hundred fifty-one".