12661280667146 has 16 divisors (see below), whose sum is σ = 19649185230240. Its totient is φ = 6111604932720.

The previous prime is 12661280667109. The next prime is 12661280667151. The reversal of 12661280667146 is 64176608216621.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12661280667091 and 12661280667100.

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, 12683876 + ... + 13645631.

It is an arithmetic number, because the mean of its divisors is an integer number (1228074076890).

Almost surely, 2^{12661280667146} is an apocalyptic number.

12661280667146 is a deficient number, since it is larger than the sum of its proper divisors (6987904563094).

12661280667146 is a wasteful number, since it uses less digits than its factorization.

12661280667146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26337829.

The product of its (nonzero) digits is 6967296, while the sum is 56.

The spelling of 12661280667146 in words is "twelve trillion, six hundred sixty-one billion, two hundred eighty million, six hundred sixty-seven thousand, one hundred forty-six".