12660630555 has 16 divisors (see below), whose sum is σ = 20258959104. Its totient is φ = 6751686240.

The previous prime is 12660630551. The next prime is 12660630557. The reversal of 12660630555 is 55503606621.

12660630555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12660630555 - 2² = 12660630551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12660630551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148890 + ... + 217920.

It is an arithmetic number, because the mean of its divisors is an integer number (1266184944).

Almost surely, 2^12660630555 is an apocalyptic number.

12660630555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12660630555 is a deficient number, since it is larger than the sum of its proper divisors (7598328549).

12660630555 is a wasteful number, since it uses less digits than its factorization.

12660630555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81266.

The product of its (nonzero) digits is 162000, while the sum is 39.

The spelling of 12660630555 in words is "twelve billion, six hundred sixty million, six hundred thirty thousand, five hundred fifty-five".