1277323241666 has 8 divisors (see below), whose sum is σ = 1952135520444. Its totient is φ = 626611401520.

The previous prime is 1277323241659. The next prime is 1277323241693. The reversal of 1277323241666 is 6661423237721.

It can be written as a sum of positive squares in 2 ways, for example, as 1224627743641 + 52695498025 = 1106629^2 + 229555^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6025109525 + ... + 6025109736.

Almost surely, 2^{1277323241666} is an apocalyptic number.

1277323241666 is a deficient number, since it is larger than the sum of its proper divisors (674812278778).

1277323241666 is a wasteful number, since it uses less digits than its factorization.

1277323241666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12050219316.

The product of its digits is 3048192, while the sum is 50.

The spelling of 1277323241666 in words is "one trillion, two hundred seventy-seven billion, three hundred twenty-three million, two hundred forty-one thousand, six hundred sixty-six".