825665567 has 2 divisors, whose sum is σ = 825665568. Its totient is φ = 825665566.

The previous prime is 825665543. The next prime is 825665587. The reversal of 825665567 is 765566528.

825665567 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 not a de Polignac number, because 825665567 - 2¹⁶ = 825600031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (825665507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412832783 + 412832784.

It is an arithmetic number, because the mean of its divisors is an integer number (412832784).

Almost surely, 2^825665567 is an apocalyptic number.

825665567 is a deficient number, since it is larger than the sum of its proper divisors (1).

825665567 is an equidigital number, since it uses as much as digits as its factorization.

825665567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024000, while the sum is 50.

The square root of 825665567 is about 28734.3969312042. The cubic root of 825665567 is about 938.1408731369.

The spelling of 825665567 in words is "eight hundred twenty-five million, six hundred sixty-five thousand, five hundred sixty-seven".