25866055 has 4 divisors (see below), whose sum is σ = 31039272. Its totient is φ = 20692840.

The previous prime is 25866047. The next prime is 25866089. The reversal of 25866055 is 55066852.

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

It is not a de Polignac number, because 25866055 - 2³ = 25866047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2586601 + ... + 2586610.

It is an arithmetic number, because the mean of its divisors is an integer number (7759818).

Almost surely, 2^25866055 is an apocalyptic number.

25866055 is a deficient number, since it is larger than the sum of its proper divisors (5173217).

25866055 is an equidigital number, since it uses as much as digits as its factorization.

25866055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5173216.

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 25866055 is about 5085.8681658100. The cubic root of 25866055 is about 295.7399979754.

The spelling of 25866055 in words is "twenty-five million, eight hundred sixty-six thousand, fifty-five".