25660416 has 44 divisors (see below), whose sum is σ = 68402552. Its totient is φ = 8552448.

The previous prime is 25660403. The next prime is 25660417. The reversal of 25660416 is 61406652.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (25660417) 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, 1105 + ... + 7248.

Almost surely, 2^25660416 is an apocalyptic number.

It is an amenable number.

25660416 is an abundant number, since it is smaller than the sum of its proper divisors (42742136).

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

25660416 is an equidigital number, since it uses as much as digits as its factorization.

25660416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8376 (or 8358 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 25660416 is about 5065.6111181179. The cubic root of 25660416 is about 294.9541861249.

The spelling of 25660416 in words is "twenty-five million, six hundred sixty thousand, four hundred sixteen".