16690685 has 16 divisors (see below), whose sum is σ = 23136192. Its totient is φ = 11424000.

The previous prime is 16690673. The next prime is 16690691. The reversal of 16690685 is 58609661.

It is not a de Polignac number, because 16690685 - 2⁶ = 16690621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7991 + ... + 9860.

It is an arithmetic number, because the mean of its divisors is an integer number (1446012).

Almost surely, 2^16690685 is an apocalyptic number.

It is an amenable number.

16690685 is a deficient number, since it is larger than the sum of its proper divisors (6445507).

16690685 is a wasteful number, since it uses less digits than its factorization.

16690685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17884.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 16690685 is about 4085.4234786617. The cubic root of 16690685 is about 255.5591217384.

The spelling of 16690685 in words is "sixteen million, six hundred ninety thousand, six hundred eighty-five".