8220470681 has 2 divisors, whose sum is σ = 8220470682. Its totient is φ = 8220470680.

The previous prime is 8220470659. The next prime is 8220470693. The reversal of 8220470681 is 1860740228.

8220470681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8211259456 + 9211225 = 90616^2 + 3035^2 .

It is a cyclic number.

It is not a de Polignac number, because 8220470681 - 2³⁰ = 7146728857 is a prime.

It is a super-2 number, since 2×8220470681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8220470381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4110235340 + 4110235341.

It is an arithmetic number, because the mean of its divisors is an integer number (4110235341).

Almost surely, 2^8220470681 is an apocalyptic number.

It is an amenable number.

8220470681 is a deficient number, since it is larger than the sum of its proper divisors (1).

8220470681 is an equidigital number, since it uses as much as digits as its factorization.

8220470681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 8220470681 is about 90666.8113534385. The cubic root of 8220470681 is about 2018.2063188233.

The spelling of 8220470681 in words is "eight billion, two hundred twenty million, four hundred seventy thousand, six hundred eighty-one".