16611220203 has 8 divisors (see below), whose sum is σ = 22862754816. Its totient is φ = 10716916200.

The previous prime is 16611220201. The next prime is 16611220207. The reversal of 16611220203 is 30202211661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16611220203 - 2¹ = 16611220201 is a prime.

It is a super-3 number, since 3×16611220203³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (16611220201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89307543 + ... + 89307728.

It is an arithmetic number, because the mean of its divisors is an integer number (2857844352).

Almost surely, 2^16611220203 is an apocalyptic number.

16611220203 is a deficient number, since it is larger than the sum of its proper divisors (6251534613).

16611220203 is a wasteful number, since it uses less digits than its factorization.

16611220203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178615305.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 16611220203 its reverse (30202211661), we get a palindrome (46813431864).

The spelling of 16611220203 in words is "sixteen billion, six hundred eleven million, two hundred twenty thousand, two hundred three".