1281066706671 has 64 divisors (see below), whose sum is σ = 1851725836800. Its totient is φ = 785134080000.

The previous prime is 1281066706657. The next prime is 1281066706691. The reversal of 1281066706671 is 1766076601821.

It is a happy number.

It is not a de Polignac number, because 1281066706671 - 2¹⁰ = 1281066705647 is a prime.

It is a super-2 number, since 2×1281066706671² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281066706651) 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, 720914535 + ... + 720916311.

It is an arithmetic number, because the mean of its divisors is an integer number (28933216200).

Almost surely, 2^{1281066706671} is an apocalyptic number.

1281066706671 is a deficient number, since it is larger than the sum of its proper divisors (570659130129).

1281066706671 is a wasteful number, since it uses less digits than its factorization.

1281066706671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3320.

The product of its (nonzero) digits is 1016064, while the sum is 51.

The spelling of 1281066706671 in words is "one trillion, two hundred eighty-one billion, sixty-six million, seven hundred six thousand, six hundred seventy-one".