25945665 has 8 divisors (see below), whose sum is σ = 41513088. Its totient is φ = 13837680.

The previous prime is 25945651. The next prime is 25945687. The reversal of 25945665 is 56654952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25945665 - 2¹⁸ = 25683521 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864841 + ... + 864870.

It is an arithmetic number, because the mean of its divisors is an integer number (5189136).

Almost surely, 2^25945665 is an apocalyptic number.

It is an amenable number.

25945665 is a deficient number, since it is larger than the sum of its proper divisors (15567423).

25945665 is a wasteful number, since it uses less digits than its factorization.

25945665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729719.

The product of its digits is 324000, while the sum is 42.

The square root of 25945665 is about 5093.6887419629. The cubic root of 25945665 is about 296.0430946812.

The spelling of 25945665 in words is "twenty-five million, nine hundred forty-five thousand, six hundred sixty-five".