12785666002 has 16 divisors (see below), whose sum is σ = 19497316824. Its totient is φ = 6286608000.

The previous prime is 12785665817. The next prime is 12785666021. The reversal of 12785666002 is 20066658721.

It can be written as a sum of positive squares in 4 ways, for example, as 6420977161 + 6364688841 = 80131^2 + 79779^2 .

It is a super-2 number, since 2×12785666002² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12785666002.

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 7 ways as a sum of consecutive naturals, for example, 706102 + ... + 723982.

Almost surely, 2^12785666002 is an apocalyptic number.

12785666002 is a deficient number, since it is larger than the sum of its proper divisors (6711650822).

12785666002 is a wasteful number, since it uses less digits than its factorization.

12785666002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23805.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 12785666002 in words is "twelve billion, seven hundred eighty-five million, six hundred sixty-six thousand, two".