1306055061666 has 12 divisors (see below), whose sum is σ = 2829785966982. Its totient is φ = 435351687216.

The previous prime is 1306055061637. The next prime is 1306055061679. The reversal of 1306055061666 is 6661605506031.

It can be written as a sum of positive squares in only one way, i.e., 1224818091225 + 81236970441 = 1106715^2 + 285021^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36279307251 + ... + 36279307286.

Almost surely, 2^{1306055061666} is an apocalyptic number.

1306055061666 is an abundant number, since it is smaller than the sum of its proper divisors (1523730905316).

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

1306055061666 is a wasteful number, since it uses less digits than its factorization.

1306055061666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72558614545 (or 72558614542 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The spelling of 1306055061666 in words is "one trillion, three hundred six billion, fifty-five million, sixty-one thousand, six hundred sixty-six".