825665587 has 2 divisors, whose sum is σ = 825665588. Its totient is φ = 825665586.

The previous prime is 825665567. The next prime is 825665597. The reversal of 825665587 is 785566528.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 825665587 - 2¹¹ = 825663539 is a prime.

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, 412832793 + 412832794.

It is an arithmetic number, because the mean of its divisors is an integer number (412832794).

Almost surely, 2^825665587 is an apocalyptic number.

825665587 is a deficient number, since it is larger than the sum of its proper divisors (1).

825665587 is an equidigital number, since it uses as much as digits as its factorization.

825665587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032000, while the sum is 52.

The square root of 825665587 is about 28734.3972792192. The cubic root of 825665587 is about 938.1408807117.

The spelling of 825665587 in words is "eight hundred twenty-five million, six hundred sixty-five thousand, five hundred eighty-seven".