25000665 has 8 divisors (see below), whose sum is σ = 40001088. Its totient is φ = 13333680.

The previous prime is 25000649. The next prime is 25000669. The reversal of 25000665 is 56600052.

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

It is not a de Polignac number, because 25000665 - 2⁴ = 25000649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25000669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 833341 + ... + 833370.

It is an arithmetic number, because the mean of its divisors is an integer number (5000136).

Almost surely, 2^25000665 is an apocalyptic number.

It is an amenable number.

25000665 is a deficient number, since it is larger than the sum of its proper divisors (15000423).

25000665 is a wasteful number, since it uses less digits than its factorization.

25000665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666719.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 25000665 is about 5000.0664995578. The cubic root of 25000665 is about 292.4043664274.

The spelling of 25000665 in words is "twenty-five million, six hundred sixty-five", and thus it is an aban number.