16650616611 has 4 divisors (see below), whose sum is σ = 22200822152. Its totient is φ = 11100411072.

The previous prime is 16650616603. The next prime is 16650616613. The reversal of 16650616611 is 11661605661.

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

It is not a de Polignac number, because 16650616611 - 2³ = 16650616603 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16650616611.

It is not an unprimeable number, because it can be changed into a prime (16650616613) 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, 2775102766 + ... + 2775102771.

It is an arithmetic number, because the mean of its divisors is an integer number (5550205538).

Almost surely, 2^16650616611 is an apocalyptic number.

16650616611 is a deficient number, since it is larger than the sum of its proper divisors (5550205541).

16650616611 is an equidigital number, since it uses as much as digits as its factorization.

16650616611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5550205540.

The product of its (nonzero) digits is 38880, while the sum is 39.

The spelling of 16650616611 in words is "sixteen billion, six hundred fifty million, six hundred sixteen thousand, six hundred eleven".