12801680666281 has 64 divisors (see below), whose sum is σ = 15008562455040. Its totient is φ = 10811118366720.

The previous prime is 12801680666231. The next prime is 12801680666321. The reversal of 12801680666281 is 18266608610821.

It is a cyclic number.

It is not a de Polignac number, because 12801680666281 - 2⁷ = 12801680666153 is a prime.

It is a super-2 number, since 2×12801680666281² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12801680666231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3451516255 + ... + 3451519963.

It is an arithmetic number, because the mean of its divisors is an integer number (234508788360).

Almost surely, 2^{12801680666281} is an apocalyptic number.

It is an amenable number.

12801680666281 is a deficient number, since it is larger than the sum of its proper divisors (2206881788759).

12801680666281 is a wasteful number, since it uses less digits than its factorization.

12801680666281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5426.

The product of its (nonzero) digits is 2654208, while the sum is 55.

The spelling of 12801680666281 in words is "twelve trillion, eight hundred one billion, six hundred eighty million, six hundred sixty-six thousand, two hundred eighty-one".