8566782061 has 2 divisors, whose sum is σ = 8566782062. Its totient is φ = 8566782060.

The previous prime is 8566782031. The next prime is 8566782083. The reversal of 8566782061 is 1602876658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8561985961 + 4796100 = 92531^2 + 2190^2 .

It is a cyclic number.

It is not a de Polignac number, because 8566782061 - 2²⁵ = 8533227629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8566781996 and 8566782014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8566782031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4283391030 + 4283391031.

It is an arithmetic number, because the mean of its divisors is an integer number (4283391031).

Almost surely, 2^8566782061 is an apocalyptic number.

It is an amenable number.

8566782061 is a deficient number, since it is larger than the sum of its proper divisors (1).

8566782061 is an equidigital number, since it uses as much as digits as its factorization.

8566782061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 49.

The square root of 8566782061 is about 92556.9125511434. The cubic root of 8566782061 is about 2046.1583465512.

The spelling of 8566782061 in words is "eight billion, five hundred sixty-six million, seven hundred eighty-two thousand, sixty-one".