8277774881 has 2 divisors, whose sum is σ = 8277774882. Its totient is φ = 8277774880.

The previous prime is 8277774829. The next prime is 8277774887. The reversal of 8277774881 is 1884777728.

It is a happy number.

8277774881 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., 7197995281 + 1079779600 = 84841^2 + 32860^2 .

It is a cyclic number.

It is not a de Polignac number, because 8277774881 - 2²² = 8273580577 is a prime.

It is a super-2 number, since 2×8277774881² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8277774881.

It is not a weakly prime, because it can be changed into another prime (8277774887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4138887440 + 4138887441.

It is an arithmetic number, because the mean of its divisors is an integer number (4138887441).

Almost surely, 2^8277774881 is an apocalyptic number.

It is an amenable number.

8277774881 is a deficient number, since it is larger than the sum of its proper divisors (1).

8277774881 is an equidigital number, since it uses as much as digits as its factorization.

8277774881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9834496, while the sum is 59.

The square root of 8277774881 is about 90982.2778402475. The cubic root of 8277774881 is about 2022.8850453108.

The spelling of 8277774881 in words is "eight billion, two hundred seventy-seven million, seven hundred seventy-four thousand, eight hundred eighty-one".