7818733668 has 24 divisors (see below), whose sum is σ = 18250858080. Its totient is φ = 2605223680.

The previous prime is 7818733667. The next prime is 7818733669. The reversal of 7818733668 is 8663378187.

It is an interprime number because it is at equal distance from previous prime (7818733667) and next prime (7818733669).

It is a super-2 number, since 2×7818733668² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7818733667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95373 + ... + 157268.

It is an arithmetic number, because the mean of its divisors is an integer number (760452420).

Almost surely, 2^7818733668 is an apocalyptic number.

It is an amenable number.

7818733668 is an abundant number, since it is smaller than the sum of its proper divisors (10432124412).

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

7818733668 is a wasteful number, since it uses less digits than its factorization.

7818733668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255227 (or 255225 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 57.

The square root of 7818733668 is about 88423.6035682781. The cubic root of 7818733668 is about 1984.7789256508.

The spelling of 7818733668 in words is "seven billion, eight hundred eighteen million, seven hundred thirty-three thousand, six hundred sixty-eight".