3871666428577 has 2 divisors, whose sum is σ = 3871666428578. Its totient is φ = 3871666428576.

The previous prime is 3871666428521. The next prime is 3871666428599. The reversal of 3871666428577 is 7758246661783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3845191559056 + 26474869521 = 1960916^2 + 162711^2 .

It is a cyclic number.

It is not a de Polignac number, because 3871666428577 - 2²³ = 3871658039969 is a prime.

It is not a weakly prime, because it can be changed into another prime (3871661428577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1935833214288 + 1935833214289.

It is an arithmetic number, because the mean of its divisors is an integer number (1935833214289).

Almost surely, 2^{3871666428577} is an apocalyptic number.

It is an amenable number.

3871666428577 is a deficient number, since it is larger than the sum of its proper divisors (1).

3871666428577 is an equidigital number, since it uses as much as digits as its factorization.

3871666428577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 568995840, while the sum is 70.

The spelling of 3871666428577 in words is "three trillion, eight hundred seventy-one billion, six hundred sixty-six million, four hundred twenty-eight thousand, five hundred seventy-seven".