1166570750721 has 8 divisors (see below), whose sum is σ = 1555453429920. Its totient is φ = 777700952672.

The previous prime is 1166570750713. The next prime is 1166570750789. The reversal of 1166570750721 is 1270570756611.

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

It is a cyclic number.

It is not a de Polignac number, because 1166570750721 - 2³ = 1166570750713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1166570750701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3006951 + ... + 3372668.

It is an arithmetic number, because the mean of its divisors is an integer number (194431678740).

Almost surely, 2^{1166570750721} is an apocalyptic number.

It is an amenable number.

1166570750721 is a deficient number, since it is larger than the sum of its proper divisors (388882679199).

1166570750721 is an equidigital number, since it uses as much as digits as its factorization.

1166570750721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6440575.

The product of its (nonzero) digits is 617400, while the sum is 48.

The spelling of 1166570750721 in words is "one trillion, one hundred sixty-six billion, five hundred seventy million, seven hundred fifty thousand, seven hundred twenty-one".