16680722313616 has 135 divisors (see below), whose sum is σ = 33405271392963. Its totient is φ = 8069080158720.

The previous prime is 16680722313601. The next prime is 16680722313653. The reversal of 16680722313616 is 61631322708661.

The square root of 16680722313616 is 4084204.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 7097982953616 + 9582739360000 = 2664204^2 + 3095600^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 84673717230 + ... + 84673717426.

Almost surely, 2^{16680722313616} is an apocalyptic number.

16680722313616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

16680722313616 is the 4084204-th square number.

It is an amenable number.

16680722313616 is an abundant number, since it is smaller than the sum of its proper divisors (16724549079347).

16680722313616 is an frugal number, since it uses more digits than its factorization.

16680722313616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690 (or 343 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 16680722313616 in words is "sixteen trillion, six hundred eighty billion, seven hundred twenty-two million, three hundred thirteen thousand, six hundred sixteen".