1271205066660 has 48 divisors (see below), whose sum is σ = 3559650022656. Its totient is φ = 338961747712.

The previous prime is 1271205066647. The next prime is 1271205066697. The reversal of 1271205066660 is 666605021721.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34017 + ... + 1594856.

It is an arithmetic number, because the mean of its divisors is an integer number (74159375472).

Almost surely, 2^{1271205066660} is an apocalyptic number.

1271205066660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271205066660 is an abundant number, since it is smaller than the sum of its proper divisors (2288444955996).

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

1271205066660 is a wasteful number, since it uses less digits than its factorization.

1271205066660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641892 (or 1641890 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 1271205066660 in words is "one trillion, two hundred seventy-one billion, two hundred five million, sixty-six thousand, six hundred sixty".