25110616660 has 24 divisors (see below), whose sum is σ = 53727246216. Its totient is φ = 9854732160.

The previous prime is 25110616613. The next prime is 25110616679. The reversal of 25110616660 is 6661601152.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5556509764 + 19554106896 = 74542^2 + 139836^2 .

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, 11843571 + ... + 11845690.

It is an arithmetic number, because the mean of its divisors is an integer number (2238635259).

Almost surely, 2^25110616660 is an apocalyptic number.

25110616660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25110616660 is an abundant number, since it is smaller than the sum of its proper divisors (28616629556).

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

25110616660 is a wasteful number, since it uses less digits than its factorization.

25110616660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23689323 (or 23689321 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 25110616660 in words is "twenty-five billion, one hundred ten million, six hundred sixteen thousand, six hundred sixty".