16661841 has 16 divisors (see below), whose sum is σ = 26726400. Its totient is φ = 9019728.

The previous prime is 16661809. The next prime is 16661851. The reversal of 16661841 is 14816661.

It is not a de Polignac number, because 16661841 - 2⁵ = 16661809 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16661851) 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, 20481 + ... + 21278.

It is an arithmetic number, because the mean of its divisors is an integer number (1670400).

Almost surely, 2^16661841 is an apocalyptic number.

It is an amenable number.

16661841 is a deficient number, since it is larger than the sum of its proper divisors (10064559).

16661841 is a wasteful number, since it uses less digits than its factorization.

16661841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41788.

The product of its digits is 6912, while the sum is 33.

The square root of 16661841 is about 4081.8918408013. The cubic root of 16661841 is about 255.4118220589.

The spelling of 16661841 in words is "sixteen million, six hundred sixty-one thousand, eight hundred forty-one".