16550566 has 4 divisors (see below), whose sum is σ = 24825852. Its totient is φ = 8275282.

The previous prime is 16550557. The next prime is 16550587. The reversal of 16550566 is 66505561.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4137640 + ... + 4137643.

It is an arithmetic number, because the mean of its divisors is an integer number (6206463).

Almost surely, 2^16550566 is an apocalyptic number.

16550566 is a deficient number, since it is larger than the sum of its proper divisors (8275286).

16550566 is an equidigital number, since it uses as much as digits as its factorization.

16550566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8275285.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 16550566 is about 4068.2386852298. The cubic root of 16550566 is about 254.8419679546.

The spelling of 16550566 in words is "sixteen million, five hundred fifty thousand, five hundred sixty-six".