16680744 has 24 divisors (see below), whose sum is σ = 45177210. Its totient is φ = 5560224.

The previous prime is 16680739. The next prime is 16680751. The reversal of 16680744 is 44708661.

It can be written as a sum of positive squares in only one way, i.e., 14152644 + 2528100 = 3762^2 + 1590^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16680699 and 16680708.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 115767 + ... + 115910.

Almost surely, 2^16680744 is an apocalyptic number.

It is an amenable number.

16680744 is an abundant number, since it is smaller than the sum of its proper divisors (28496466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16680744 is a wasteful number, since it uses less digits than its factorization.

16680744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231689 (or 231682 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 16680744 is about 4084.2066549086. The cubic root of 16680744 is about 255.5083745147.

It can be divided in two parts, 16680 and 744, that added together give a square (17424 = 132²).

The spelling of 16680744 in words is "sixteen million, six hundred eighty thousand, seven hundred forty-four".