16661055 has 16 divisors (see below), whose sum is σ = 26726400. Its totient is φ = 8863008.

The previous prime is 16660979. The next prime is 16661083. The reversal of 16661055 is 55016661.

It is not a de Polignac number, because 16661055 - 2⁹ = 16660543 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5746 + ... + 8144.

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

Almost surely, 2^16661055 is an apocalyptic number.

16661055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16661055 is a deficient number, since it is larger than the sum of its proper divisors (10065345).

16661055 is a wasteful number, since it uses less digits than its factorization.

16661055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2870.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 16661055 is about 4081.7955607796. The cubic root of 16661055 is about 255.4078057590.

The spelling of 16661055 in words is "sixteen million, six hundred sixty-one thousand, fifty-five".