21416126066 has 8 divisors (see below), whose sum is σ = 32992410540. Its totient is φ = 10418655888.

The previous prime is 21416126063. The next prime is 21416126093. The reversal of 21416126066 is 66062161412.

It can be written as a sum of positive squares in 2 ways, for example, as 20457294841 + 958831225 = 143029^2 + 30965^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21416126063) 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, 144703481 + ... + 144703628.

Almost surely, 2^21416126066 is an apocalyptic number.

21416126066 is a deficient number, since it is larger than the sum of its proper divisors (11576284474).

21416126066 is a wasteful number, since it uses less digits than its factorization.

21416126066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289407148.

The product of its (nonzero) digits is 20736, while the sum is 35.

Adding to 21416126066 its reverse (66062161412), we get a palindrome (87478287478).

The spelling of 21416126066 in words is "twenty-one billion, four hundred sixteen million, one hundred twenty-six thousand, sixty-six".