16505066 has 4 divisors (see below), whose sum is σ = 24757602. Its totient is φ = 8252532.

The previous prime is 16505063. The next prime is 16505087. The reversal of 16505066 is 66050561.

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

It can be written as a sum of positive squares in only one way, i.e., 15642025 + 863041 = 3955^2 + 929^2 .

It is not an unprimeable number, because it can be changed into a prime (16505063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4126265 + ... + 4126268.

Almost surely, 2^16505066 is an apocalyptic number.

16505066 is a deficient number, since it is larger than the sum of its proper divisors (8252536).

16505066 is an equidigital number, since it uses as much as digits as its factorization.

16505066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8252535.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 16505066 is about 4062.6427359540. The cubic root of 16505066 is about 254.6082206303.

The spelling of 16505066 in words is "sixteen million, five hundred five thousand, sixty-six".