2666630216 has 16 divisors (see below), whose sum is σ = 5001191340. Its totient is φ = 1332979200.

The previous prime is 2666630191. The next prime is 2666630237. The reversal of 2666630216 is 6120366662.

It can be written as a sum of positive squares in 2 ways, for example, as 2645044900 + 21585316 = 51430^2 + 4646^2 .

It is a super-2 number, since 2×2666630216² = 14221833417768413312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2666630216.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6485 + ... + 73316.

Almost surely, 2^2666630216 is an apocalyptic number.

It is an amenable number.

2666630216 is a deficient number, since it is larger than the sum of its proper divisors (2334561124).

2666630216 is a wasteful number, since it uses less digits than its factorization.

2666630216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83984 (or 83980 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 2666630216 is about 51639.4250161638. The cubic root of 2666630216 is about 1386.7162303023.

Adding to 2666630216 its reverse (6120366662), we get a palindrome (8786996878).

The spelling of 2666630216 in words is "two billion, six hundred sixty-six million, six hundred thirty thousand, two hundred sixteen".