16866736384 has 27 divisors (see below), whose sum is σ = 33671735377. Its totient is φ = 8432329216.

The previous prime is 16866736361. The next prime is 16866736387. The reversal of 16866736384 is 48363766861.

It is a happy number.

The square root of 16866736384 is 129872.

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

It can be written as a sum of positive squares in only one way, i.e., 15276960000 + 1589776384 = 123600^2 + 39872^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16866736387) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2073894 + ... + 2082010.

Almost surely, 2^16866736384 is an apocalyptic number.

16866736384 is the 129872-nd square number.

It is an amenable number.

16866736384 is a deficient number, since it is larger than the sum of its proper divisors (16804998993).

16866736384 is an frugal number, since it uses more digits than its factorization.

16866736384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16250 (or 8119 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 58.

The spelling of 16866736384 in words is "sixteen billion, eight hundred sixty-six million, seven hundred thirty-six thousand, three hundred eighty-four".