27660530525 has 12 divisors (see below), whose sum is σ = 34374124692. Its totient is φ = 22079994240.

The previous prime is 27660530497. The next prime is 27660530563. The reversal of 27660530525 is 52503506672.

It can be written as a sum of positive squares in 6 ways, for example, as 304362916 + 27356167609 = 17446^2 + 165397^2 .

It is a de Polignac number, because none of the positive numbers 2^k-27660530525 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1199102 + ... + 1221951.

It is an arithmetic number, because the mean of its divisors is an integer number (2864510391).

Almost surely, 2^27660530525 is an apocalyptic number.

27660530525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27660530525 is a deficient number, since it is larger than the sum of its proper divisors (6713594167).

27660530525 is a wasteful number, since it uses less digits than its factorization.

27660530525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2421520 (or 2421515 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 41.

The spelling of 27660530525 in words is "twenty-seven billion, six hundred sixty million, five hundred thirty thousand, five hundred twenty-five".