25065665 has 4 divisors (see below), whose sum is σ = 30078804. Its totient is φ = 20052528.

The previous prime is 25065647. The next prime is 25065697. The reversal of 25065665 is 56656052.

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 19439281 + 5626384 = 4409^2 + 2372^2 .

It is a cyclic number.

It is not a de Polignac number, because 25065665 - 2¹⁴ = 25049281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2506562 + ... + 2506571.

It is an arithmetic number, because the mean of its divisors is an integer number (7519701).

Almost surely, 2^25065665 is an apocalyptic number.

It is an amenable number.

25065665 is a deficient number, since it is larger than the sum of its proper divisors (5013139).

25065665 is an equidigital number, since it uses as much as digits as its factorization.

25065665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5013138.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 25065665 is about 5006.5621937613. The cubic root of 25065665 is about 292.6575575044.

The spelling of 25065665 in words is "twenty-five million, sixty-five thousand, six hundred sixty-five".