16680605 has 16 divisors (see below), whose sum is σ = 20443584. Its totient is φ = 13063680.

The previous prime is 16680583. The next prime is 16680607. The reversal of 16680605 is 50608661.

It is not a de Polignac number, because 16680605 - 2²² = 12486301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16680607) 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, 78950 + ... + 79160.

It is an arithmetic number, because the mean of its divisors is an integer number (1277724).

Almost surely, 2^16680605 is an apocalyptic number.

It is an amenable number.

16680605 is a deficient number, since it is larger than the sum of its proper divisors (3762979).

16680605 is a wasteful number, since it uses less digits than its factorization.

16680605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 16680605 is about 4084.1896381045. The cubic root of 16680605 is about 255.5076647989.

The spelling of 16680605 in words is "sixteen million, six hundred eighty thousand, six hundred five".