25532660 has 24 divisors (see below), whose sum is σ = 53713800. Its totient is φ = 10194944.

The previous prime is 25532659. The next prime is 25532681. The reversal of 25532660 is 6623552.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5354596 + 20178064 = 2314^2 + 4492^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20372 + ... + 21588.

It is an arithmetic number, because the mean of its divisors is an integer number (2238075).

Almost surely, 2^25532660 is an apocalyptic number.

25532660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25532660 is an abundant number, since it is smaller than the sum of its proper divisors (28181140).

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

25532660 is a wasteful number, since it uses less digits than its factorization.

25532660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275 (or 2273 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 25532660 is about 5052.9852562619. The cubic root of 25532660 is about 294.4638735119.

The spelling of 25532660 in words is "twenty-five million, five hundred thirty-two thousand, six hundred sixty".