11660760225 has 81 divisors (see below), whose sum is σ = 21903251097. Its totient is φ = 5929672320.

The previous prime is 11660760203. The next prime is 11660760227. The reversal of 11660760225 is 52206706611.

It is a happy number.

The square root of 11660760225 is 107985.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 6550797969 + 5109962256 = 80937^2 + 71484^2 .

It is not a de Polignac number, because 11660760225 - 2¹¹ = 11660758177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11660760225.

It is not an unprimeable number, because it can be changed into a prime (11660760227) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 37254669 + ... + 37254981.

Almost surely, 2^11660760225 is an apocalyptic number.

11660760225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11660760225 is the 107985-th square number.

11660760225 is the 53993-rd centered octagonal number.

It is an amenable number.

11660760225 is a deficient number, since it is larger than the sum of its proper divisors (10242490872).

11660760225 is an equidigital number, since it uses as much as digits as its factorization.

11660760225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

Multiplying 11660760225 by its sum of digits (36), we get a square (419787368100 = 647910²).

The spelling of 11660760225 in words is "eleven billion, six hundred sixty million, seven hundred sixty thousand, two hundred twenty-five".