16661075 has 12 divisors (see below), whose sum is σ = 20721888. Its totient is φ = 13288800.

The previous prime is 16660979. The next prime is 16661083. The reversal of 16661075 is 57016661.

It is not a de Polignac number, because 16661075 - 2¹² = 16656979 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9734 + ... + 11316.

It is an arithmetic number, because the mean of its divisors is an integer number (1726824).

Almost surely, 2^16661075 is an apocalyptic number.

16661075 is a deficient number, since it is larger than the sum of its proper divisors (4060813).

16661075 is a wasteful number, since it uses less digits than its factorization.

16661075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014 (or 2009 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 16661075 is about 4081.7980106811. The cubic root of 16661075 is about 255.4079079565.

The spelling of 16661075 in words is "sixteen million, six hundred sixty-one thousand, seventy-five".