25448661 has 28 divisors (see below), whose sum is σ = 43615072. Its totient is φ = 14539176.

The previous prime is 25448653. The next prime is 25448681. The reversal of 25448661 is 16684452.

It is not a de Polignac number, because 25448661 - 2³ = 25448653 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 (25448681) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2610 + ... + 7596.

Almost surely, 2^25448661 is an apocalyptic number.

25448661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25448661 is a deficient number, since it is larger than the sum of its proper divisors (18166411).

25448661 is an frugal number, since it uses more digits than its factorization.

25448661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5012 (or 4997 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 25448661 is about 5044.6665895776. Note that the first 3 decimals coincide. The cubic root of 25448661 is about 294.1406033007.

The spelling of 25448661 in words is "twenty-five million, four hundred forty-eight thousand, six hundred sixty-one".