16616011 has 4 divisors (see below), whose sum is σ = 16688800. Its totient is φ = 16543224.

The previous prime is 16616009. The next prime is 16616023. The reversal of 16616011 is 11061661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11061661 = 13 ⋅850897.

It is a cyclic number.

It is not a de Polignac number, because 16616011 - 2¹ = 16616009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16616081) 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, 36051 + ... + 36508.

It is an arithmetic number, because the mean of its divisors is an integer number (4172200).

Almost surely, 2^16616011 is an apocalyptic number.

16616011 is a deficient number, since it is larger than the sum of its proper divisors (72789).

16616011 is an equidigital number, since it uses as much as digits as its factorization.

16616011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72788.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 16616011 is about 4076.2741566288. The cubic root of 16616011 is about 255.1774287401.

Adding to 16616011 its reverse (11061661), we get a palindrome (27677672).

The spelling of 16616011 in words is "sixteen million, six hundred sixteen thousand, eleven".