25066440 has 240 divisors, whose sum is σ = 98315100. Its totient is φ = 5531904.

The previous prime is 25066439. The next prime is 25066441. The reversal of 25066440 is 4466052.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25066439) and next prime (25066441).

It can be written as a sum of positive squares in 2 ways, for example, as 24980004 + 86436 = 4998^2 + 294^2 .

It is not an unprimeable number, because it can be changed into a prime (25066441) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 864346 + ... + 864374.

Almost surely, 2^25066440 is an apocalyptic number.

25066440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25066440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49157550).

25066440 is an abundant number, since it is smaller than the sum of its proper divisors (73248660).

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

25066440 is a wasteful number, since it uses less digits than its factorization.

25066440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 25066440 is about 5006.6395915824. The cubic root of 25066440 is about 292.6605736790.

The spelling of 25066440 in words is "twenty-five million, sixty-six thousand, four hundred forty".