25160665 has 4 divisors (see below), whose sum is σ = 30192804. Its totient is φ = 20128528.

The previous prime is 25160659. The next prime is 25160683. The reversal of 25160665 is 56606152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2985984 + 22174681 = 1728^2 + 4709^2 .

It is a cyclic number.

It is not a de Polignac number, because 25160665 - 2²³ = 16772057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2516062 + ... + 2516071.

It is an arithmetic number, because the mean of its divisors is an integer number (7548201).

Almost surely, 2^25160665 is an apocalyptic number.

It is an amenable number.

25160665 is a deficient number, since it is larger than the sum of its proper divisors (5032139).

25160665 is an equidigital number, since it uses as much as digits as its factorization.

25160665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5032138.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 25160665 is about 5016.0407693718. The cubic root of 25160665 is about 293.0268198337.

The spelling of 25160665 in words is "twenty-five million, one hundred sixty thousand, six hundred sixty-five".