12660370551055 has 8 divisors (see below), whose sum is σ = 15209689212144. Its totient is φ = 10116800073600.

The previous prime is 12660370551043. The next prime is 12660370551089. The reversal of 12660370551055 is 55015507306621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12660370551055 - 2³⁹ = 12110614737167 is a prime.

It is a super-2 number, since 2×12660370551055² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12660370550996 and 12660370551014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1437041061 + ... + 1437049870.

It is an arithmetic number, because the mean of its divisors is an integer number (1901211151518).

Almost surely, 2^{12660370551055} is an apocalyptic number.

12660370551055 is a deficient number, since it is larger than the sum of its proper divisors (2549318661089).

12660370551055 is an equidigital number, since it uses as much as digits as its factorization.

12660370551055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2874091817.

The product of its (nonzero) digits is 945000, while the sum is 46.

Adding to 12660370551055 its reverse (55015507306621), we get a palindrome (67675877857676).

The spelling of 12660370551055 in words is "twelve trillion, six hundred sixty billion, three hundred seventy million, five hundred fifty-one thousand, fifty-five".