25650660 has 96 divisors (see below), whose sum is σ = 82817280. Its totient is φ = 5810688.

The previous prime is 25650641. The next prime is 25650701. The reversal of 25650660 is 6605652.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65746 + ... + 66134.

It is an arithmetic number, because the mean of its divisors is an integer number (862680).

Almost surely, 2^25650660 is an apocalyptic number.

25650660 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 25650660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41408640).

25650660 is an abundant number, since it is smaller than the sum of its proper divisors (57166620).

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

25650660 is a wasteful number, since it uses less digits than its factorization.

25650660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 25650660 is about 5064.6480627977. The cubic root of 25650660 is about 294.9168012049.

The spelling of 25650660 in words is "twenty-five million, six hundred fifty thousand, six hundred sixty".