16633233661 has 6 divisors (see below), whose sum is σ = 18282810686. Its totient is φ = 15121121400.

The previous prime is 16633233637. The next prime is 16633233667.

16633233661 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 9468457636 + 7164776025 = 97306^2 + 84645^2 .

It is not a de Polignac number, because 16633233661 - 2⁵ = 16633233629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16633233667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68732250 + ... + 68732491.

Almost surely, 2^16633233661 is an apocalyptic number.

16633233661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16633233661 is a deficient number, since it is larger than the sum of its proper divisors (1649577025).

16633233661 is a wasteful number, since it uses less digits than its factorization.

16633233661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137464763 (or 137464752 counting only the distinct ones).

The product of its digits is 209952, while the sum is 40.

The spelling of 16633233661 in words is "sixteen billion, six hundred thirty-three million, two hundred thirty-three thousand, six hundred sixty-one".