16680507 has 4 divisors (see below), whose sum is σ = 22240680. Its totient is φ = 11120336.

The previous prime is 16680467. The next prime is 16680509. The reversal of 16680507 is 70508661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16680507 - 2¹⁰ = 16679483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16680509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2780082 + ... + 2780087.

It is an arithmetic number, because the mean of its divisors is an integer number (5560170).

Almost surely, 2^16680507 is an apocalyptic number.

16680507 is a deficient number, since it is larger than the sum of its proper divisors (5560173).

16680507 is an equidigital number, since it uses as much as digits as its factorization.

16680507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5560172.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 16680507 is about 4084.1776406028. The cubic root of 16680507 is about 255.5071644214.

The spelling of 16680507 in words is "sixteen million, six hundred eighty thousand, five hundred seven".