1271811702066 has 16 divisors (see below), whose sum is σ = 2543779468800. Its totient is φ = 423911223248.

The previous prime is 1271811702053. The next prime is 1271811702079. The reversal of 1271811702066 is 6602071181721.

It is an interprime number because it is at equal distance from previous prime (1271811702053) and next prime (1271811702079).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6396621 + ... + 6592448.

It is an arithmetic number, because the mean of its divisors is an integer number (158986216800).

Almost surely, 2^{1271811702066} is an apocalyptic number.

1271811702066 is an abundant number, since it is smaller than the sum of its proper divisors (1271967766734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1271811702066 is a wasteful number, since it uses less digits than its factorization.

1271811702066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13005393.

The product of its (nonzero) digits is 56448, while the sum is 42.

Adding to 1271811702066 its reverse (6602071181721), we get a palindrome (7873882883787).

The spelling of 1271811702066 in words is "one trillion, two hundred seventy-one billion, eight hundred eleven million, seven hundred two thousand, sixty-six".