18066680525 has 12 divisors (see below), whose sum is σ = 22624495764. Its totient is φ = 14310240000.

The previous prime is 18066680503. The next prime is 18066680543. The reversal of 18066680525 is 52508666081.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 250304041 + 17816376484 = 15821^2 + 133478^2 .

It is not a de Polignac number, because 18066680525 - 2¹⁶ = 18066614989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18066680525.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3575036 + ... + 3580085.

It is an arithmetic number, because the mean of its divisors is an integer number (1885374647).

Almost surely, 2^18066680525 is an apocalyptic number.

It is an amenable number.

18066680525 is a deficient number, since it is larger than the sum of its proper divisors (4557815239).

18066680525 is a wasteful number, since it uses less digits than its factorization.

18066680525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7155232 (or 7155227 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 47.

The spelling of 18066680525 in words is "eighteen billion, sixty-six million, six hundred eighty thousand, five hundred twenty-five".