25598664 has 96 divisors (see below), whose sum is σ = 85350720. Its totient is φ = 6749568.

The previous prime is 25598663. The next prime is 25598687. The reversal of 25598664 is 46689552.

It is not an unprimeable number, because it can be changed into a prime (25598663) 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 23 ways as a sum of consecutive naturals, for example, 4599 + ... + 8505.

It is an arithmetic number, because the mean of its divisors is an integer number (889070).

Almost surely, 2^25598664 is an apocalyptic number.

25598664 is a gapful number since it is divisible by the number (24) 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 25598664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42675360).

25598664 is an abundant number, since it is smaller than the sum of its proper divisors (59752056).

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

25598664 is a wasteful number, since it uses less digits than its factorization.

25598664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3939 (or 3932 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 25598664 is about 5059.5122294545. The cubic root of 25598664 is about 294.7173928582.

It can be divided in two parts, 25598 and 664, that added together give a palindrome (26262).

The spelling of 25598664 in words is "twenty-five million, five hundred ninety-eight thousand, six hundred sixty-four".