25665063 has 4 divisors (see below), whose sum is σ = 34220088. Its totient is φ = 17110040.

The previous prime is 25665047. The next prime is 25665071. The reversal of 25665063 is 36056652.

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 25665063 - 2⁴ = 25665047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25665043) 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, 4277508 + ... + 4277513.

It is an arithmetic number, because the mean of its divisors is an integer number (8555022).

Almost surely, 2^25665063 is an apocalyptic number.

25665063 is a deficient number, since it is larger than the sum of its proper divisors (8555025).

25665063 is an equidigital number, since it uses as much as digits as its factorization.

25665063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8555024.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 25665063 is about 5066.0697784377. The cubic root of 25665063 is about 294.9719900630.

Subtracting from 25665063 its sum of digits (33), we obtain a triangular number (25665030 = T₇₁₆₄).

The spelling of 25665063 in words is "twenty-five million, six hundred sixty-five thousand, sixty-three".