166680573 has 4 divisors (see below), whose sum is σ = 222240768. Its totient is φ = 111120380.

The previous prime is 166680557. The next prime is 166680581. The reversal of 166680573 is 375086661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166680573 - 2⁴ = 166680557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166680533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27780093 + ... + 27780098.

It is an arithmetic number, because the mean of its divisors is an integer number (55560192).

Almost surely, 2^166680573 is an apocalyptic number.

It is an amenable number.

166680573 is a deficient number, since it is larger than the sum of its proper divisors (55560195).

166680573 is an equidigital number, since it uses as much as digits as its factorization.

166680573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55560194.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 166680573 is about 12910.4830660979. The cubic root of 166680573 is about 550.3365136237.

The spelling of 166680573 in words is "one hundred sixty-six million, six hundred eighty thousand, five hundred seventy-three".