16641011 has 4 divisors (see below), whose sum is σ = 17619912. Its totient is φ = 15662112.

The previous prime is 16640999. The next prime is 16641019. The reversal of 16641011 is 11014661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16641011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16641019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489425 + ... + 489458.

It is an arithmetic number, because the mean of its divisors is an integer number (4404978).

Almost surely, 2^16641011 is an apocalyptic number.

16641011 is a deficient number, since it is larger than the sum of its proper divisors (978901).

16641011 is an equidigital number, since it uses as much as digits as its factorization.

16641011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978900.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 16641011 is about 4079.3395298749. The cubic root of 16641011 is about 255.3053422919.

Adding to 16641011 its reverse (11014661), we get a palindrome (27655672).

The spelling of 16641011 in words is "sixteen million, six hundred forty-one thousand, eleven".