1306545666 has 8 divisors (see below), whose sum is σ = 2613091344. Its totient is φ = 435515220.

The previous prime is 1306545629. The next prime is 1306545683. The reversal of 1306545666 is 6665456031.

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

1306545666 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108878800 + ... + 108878811.

It is an arithmetic number, because the mean of its divisors is an integer number (326636418).

Almost surely, 2^1306545666 is an apocalyptic number.

1306545666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1306545666 is a wasteful number, since it uses less digits than its factorization.

1306545666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217757616.

The product of its (nonzero) digits is 388800, while the sum is 42.

The square root of 1306545666 is about 36146.1708345435. The cubic root of 1306545666 is about 1093.2215847475.

The spelling of 1306545666 in words is "one billion, three hundred six million, five hundred forty-five thousand, six hundred sixty-six".