2666816018 has 8 divisors (see below), whose sum is σ = 4036923660. Its totient is φ = 1321174800.

The previous prime is 2666815997. The next prime is 2666816021. The reversal of 2666816018 is 8106186662.

It can be written as a sum of positive squares in 2 ways, for example, as 2630971849 + 35844169 = 51293^2 + 5987^2 .

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

It is a super-2 number, since 2×2666816018² = 14223815347722752648, 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 2666816018.

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, 6116333 + ... + 6116768.

Almost surely, 2^2666816018 is an apocalyptic number.

2666816018 is a deficient number, since it is larger than the sum of its proper divisors (1370107642).

2666816018 is a wasteful number, since it uses less digits than its factorization.

2666816018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12233212.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 2666816018 is about 51641.2240172520. The cubic root of 2666816018 is about 1386.7484368257.

The spelling of 2666816018 in words is "two billion, six hundred sixty-six million, eight hundred sixteen thousand, eighteen".