166560011 has 4 divisors (see below), whose sum is σ = 166641024. Its totient is φ = 166479000.

The previous prime is 166560007. The next prime is 166560013. The reversal of 166560011 is 110065661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166560011 - 2² = 166560007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166560013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37340 + ... + 41561.

It is an arithmetic number, because the mean of its divisors is an integer number (41660256).

Almost surely, 2^166560011 is an apocalyptic number.

166560011 is a deficient number, since it is larger than the sum of its proper divisors (81013).

166560011 is an equidigital number, since it uses as much as digits as its factorization.

166560011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81012.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 166560011 is about 12905.8130700859. The cubic root of 166560011 is about 550.2037933490.

The spelling of 166560011 in words is "one hundred sixty-six million, five hundred sixty thousand, eleven".