7818068773 has 2 divisors, whose sum is σ = 7818068774. Its totient is φ = 7818068772.

The previous prime is 7818068747. The next prime is 7818068821. The reversal of 7818068773 is 3778608187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4298375844 + 3519692929 = 65562^2 + 59327^2 .

It is a cyclic number.

It is not a de Polignac number, because 7818068773 - 2²¹ = 7815971621 is a prime.

It is a super-2 number, since 2×7818068773² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7818060773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3909034386 + 3909034387.

It is an arithmetic number, because the mean of its divisors is an integer number (3909034387).

Almost surely, 2^7818068773 is an apocalyptic number.

It is an amenable number.

7818068773 is a deficient number, since it is larger than the sum of its proper divisors (1).

7818068773 is an equidigital number, since it uses as much as digits as its factorization.

7818068773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3161088, while the sum is 55.

The square root of 7818068773 is about 88419.8437738950. The cubic root of 7818068773 is about 1984.7226630449.

The spelling of 7818068773 in words is "seven billion, eight hundred eighteen million, sixty-eight thousand, seven hundred seventy-three".