8021208077 has 2 divisors, whose sum is σ = 8021208078. Its totient is φ = 8021208076.

The previous prime is 8021208043. The next prime is 8021208079. The reversal of 8021208077 is 7708021208.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7420271881 + 600936196 = 86141^2 + 24514^2 .

It is a cyclic number.

It is not a de Polignac number, because 8021208077 - 2¹⁶ = 8021142541 is a prime.

Together with 8021208079, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8021208079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4010604038 + 4010604039.

It is an arithmetic number, because the mean of its divisors is an integer number (4010604039).

Almost surely, 2^8021208077 is an apocalyptic number.

It is an amenable number.

8021208077 is a deficient number, since it is larger than the sum of its proper divisors (1).

8021208077 is an equidigital number, since it uses as much as digits as its factorization.

8021208077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 8021208077 is about 89561.1973848050. The cubic root of 8021208077 is about 2001.7657803012.

The spelling of 8021208077 in words is "eight billion, twenty-one million, two hundred eight thousand, seventy-seven".