16706952721 has 16 divisors (see below), whose sum is σ = 17049876480. Its totient is φ = 16367806800.

The previous prime is 16706952709. The next prime is 16706952749. The reversal of 16706952721 is 12725960761.

It is a cyclic number.

It is not a de Polignac number, because 16706952721 - 2⁹ = 16706952209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16706952421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13021146 + ... + 13022428.

It is an arithmetic number, because the mean of its divisors is an integer number (1065617280).

Almost surely, 2^16706952721 is an apocalyptic number.

It is an amenable number.

16706952721 is a deficient number, since it is larger than the sum of its proper divisors (342923759).

16706952721 is a wasteful number, since it uses less digits than its factorization.

16706952721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2556.

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 16706952721 in words is "sixteen billion, seven hundred six million, nine hundred fifty-two thousand, seven hundred twenty-one".