25666463 has 4 divisors (see below), whose sum is σ = 25685808. Its totient is φ = 25647120.

The previous prime is 25666439. The next prime is 25666477. The reversal of 25666463 is 36466652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25666463 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 (25666763) 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, 7523 + ... + 10388.

It is an arithmetic number, because the mean of its divisors is an integer number (6421452).

Almost surely, 2^25666463 is an apocalyptic number.

25666463 is a deficient number, since it is larger than the sum of its proper divisors (19345).

25666463 is a wasteful number, since it uses less digits than its factorization.

25666463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19344.

The product of its digits is 155520, while the sum is 38.

The square root of 25666463 is about 5066.2079507261. The cubic root of 25666463 is about 294.9773534277.

The spelling of 25666463 in words is "twenty-five million, six hundred sixty-six thousand, four hundred sixty-three".