25663000 has 64 divisors (see below), whose sum is σ = 65538720. Its totient is φ = 9328000.

The previous prime is 25662997. The next prime is 25663003. The reversal of 25663000 is 36652.

It is an interprime number because it is at equal distance from previous prime (25662997) and next prime (25663003).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25663003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9834 + ... + 12166.

Almost surely, 2^25663000 is an apocalyptic number.

25663000 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 25663000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32769360).

25663000 is an abundant number, since it is smaller than the sum of its proper divisors (39875720).

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

25663000 is a wasteful number, since it uses less digits than its factorization.

25663000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365 (or 2351 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 25663000 is about 5065.8661648330. The cubic root of 25663000 is about 294.9640864065.

Adding to 25663000 its reverse (36652), we get a palindrome (25699652).

The spelling of 25663000 in words is "twenty-five million, six hundred sixty-three thousand".