2666518218 has 96 divisors (see below), whose sum is σ = 7374197376. Its totient is φ = 703245888.

The previous prime is 2666518177. The next prime is 2666518219. The reversal of 2666518218 is 8128156662.

It is a super-2 number, since 2×2666518218² = 14220638813851791048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2666518219) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14080 + ... + 74372.

It is an arithmetic number, because the mean of its divisors is an integer number (76814556).

Almost surely, 2^2666518218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2666518218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3687098688).

2666518218 is an abundant number, since it is smaller than the sum of its proper divisors (4707679158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2666518218 is a wasteful number, since it uses less digits than its factorization.

2666518218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60330 (or 60318 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 2666518218 is about 51638.3405813936. The cubic root of 2666518218 is about 1386.6968160846.

The spelling of 2666518218 in words is "two billion, six hundred sixty-six million, five hundred eighteen thousand, two hundred eighteen".