25660086 has 16 divisors (see below), whose sum is σ = 51591168. Its totient is φ = 8508200.

The previous prime is 25660079. The next prime is 25660087. The reversal of 25660086 is 68006652.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25660087) 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, 10050 + ... + 12341.

It is an arithmetic number, because the mean of its divisors is an integer number (3224448).

Almost surely, 2^25660086 is an apocalyptic number.

25660086 is an abundant number, since it is smaller than the sum of its proper divisors (25931082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25660086 is a wasteful number, since it uses less digits than its factorization.

25660086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22587.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 25660086 is about 5065.5785454378. The cubic root of 25660086 is about 294.9529217222.

It can be divided in two parts, 256600 and 86, that added together give a triangular number (256686 = T₇₁₆).

The spelling of 25660086 in words is "twenty-five million, six hundred sixty thousand, eighty-six".