25663655 has 8 divisors (see below), whose sum is σ = 30823584. Its totient is φ = 20512800.

The previous prime is 25663621. The next prime is 25663657. The reversal of 25663655 is 55636652.

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

It is not a de Polignac number, because 25663655 - 2⁸ = 25663399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25663657) 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 7 ways as a sum of consecutive naturals, for example, 9950 + ... + 12260.

It is an arithmetic number, because the mean of its divisors is an integer number (3852948).

Almost surely, 2^25663655 is an apocalyptic number.

25663655 is a deficient number, since it is larger than the sum of its proper divisors (5159929).

25663655 is a wasteful number, since it uses less digits than its factorization.

25663655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4537.

The product of its digits is 162000, while the sum is 38.

The square root of 25663655 is about 5065.9308127925. The cubic root of 25663655 is about 294.9665958538.

The spelling of 25663655 in words is "twenty-five million, six hundred sixty-three thousand, six hundred fifty-five".