25520566 has 8 divisors (see below), whose sum is σ = 38453184. Its totient is φ = 12702840.

The previous prime is 25520563. The next prime is 25520569. The reversal of 25520566 is 66502552.

It is an interprime number because it is at equal distance from previous prime (25520563) and next prime (25520569).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25520563) 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, 28165 + ... + 29056.

It is an arithmetic number, because the mean of its divisors is an integer number (4806648).

Almost surely, 2^25520566 is an apocalyptic number.

25520566 is a deficient number, since it is larger than the sum of its proper divisors (12932618).

25520566 is a wasteful number, since it uses less digits than its factorization.

25520566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57446.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 25520566 is about 5051.7883962019. The cubic root of 25520566 is about 294.4173734800.

The spelling of 25520566 in words is "twenty-five million, five hundred twenty thousand, five hundred sixty-six".