25668659 has 4 divisors (see below), whose sum is σ = 25683216. Its totient is φ = 25654104.

The previous prime is 25668653. The next prime is 25668661. The reversal of 25668659 is 95686652.

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

It is a cyclic number.

It is not a de Polignac number, because 25668659 - 2²⁰ = 24620083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25668653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4199 + ... + 8304.

It is an arithmetic number, because the mean of its divisors is an integer number (6420804).

Almost surely, 2^25668659 is an apocalyptic number.

25668659 is a deficient number, since it is larger than the sum of its proper divisors (14557).

25668659 is a wasteful number, since it uses less digits than its factorization.

25668659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14556.

The product of its digits is 777600, while the sum is 47.

The square root of 25668659 is about 5066.4246762387. The cubic root of 25668659 is about 294.9857658554.

The spelling of 25668659 in words is "twenty-five million, six hundred sixty-eight thousand, six hundred fifty-nine".