25668403 has 4 divisors (see below), whose sum is σ = 26496448. Its totient is φ = 24840360.

The previous prime is 25668397. The next prime is 25668427. The reversal of 25668403 is 30486652.

It is a happy number.

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 25668403 - 2⁵ = 25668371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25668473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413976 + ... + 414037.

It is an arithmetic number, because the mean of its divisors is an integer number (6624112).

Almost surely, 2^25668403 is an apocalyptic number.

25668403 is a deficient number, since it is larger than the sum of its proper divisors (828045).

25668403 is an equidigital number, since it uses as much as digits as its factorization.

25668403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828044.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 25668403 is about 5066.3994118111. The cubic root of 25668403 is about 294.9847851963.

The spelling of 25668403 in words is "twenty-five million, six hundred sixty-eight thousand, four hundred three".