16661063 has 4 divisors (see below), whose sum is σ = 17111400. Its totient is φ = 16210728.

The previous prime is 16660979. The next prime is 16661083. The reversal of 16661063 is 36016661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16661063 - 2⁸ = 16660807 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 (16661083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225113 + ... + 225186.

It is an arithmetic number, because the mean of its divisors is an integer number (4277850).

Almost surely, 2^16661063 is an apocalyptic number.

16661063 is a deficient number, since it is larger than the sum of its proper divisors (450337).

16661063 is an equidigital number, since it uses as much as digits as its factorization.

16661063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450336.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 16661063 is about 4081.7965407404. The cubic root of 16661063 is about 255.4078466380.

The spelling of 16661063 in words is "sixteen million, six hundred sixty-one thousand, sixty-three".