825660571 has 2 divisors, whose sum is σ = 825660572. Its totient is φ = 825660570.

The previous prime is 825660551. The next prime is 825660581. The reversal of 825660571 is 175066528.

825660571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-825660571 is a prime.

It is not a weakly prime, because it can be changed into another prime (825660551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412830285 + 412830286.

It is an arithmetic number, because the mean of its divisors is an integer number (412830286).

Almost surely, 2^825660571 is an apocalyptic number.

825660571 is a deficient number, since it is larger than the sum of its proper divisors (1).

825660571 is an equidigital number, since it uses as much as digits as its factorization.

825660571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 825660571 is about 28734.3099969357. The cubic root of 825660571 is about 938.1389809417.

The spelling of 825660571 in words is "eight hundred twenty-five million, six hundred sixty thousand, five hundred seventy-one".