166579145 has 4 divisors (see below), whose sum is σ = 199894980. Its totient is φ = 133263312.

The previous prime is 166579117. The next prime is 166579201. The reversal of 166579145 is 541975661.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30063289 + 136515856 = 5483^2 + 11684^2 .

It is a cyclic number.

It is not a de Polignac number, because 166579145 - 2¹² = 166575049 is a prime.

It is a super-2 number, since 2×166579145² = 55497223097862050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166579096 and 166579105.

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 3 ways as a sum of consecutive naturals, for example, 16657910 + ... + 16657919.

It is an arithmetic number, because the mean of its divisors is an integer number (49973745).

Almost surely, 2^166579145 is an apocalyptic number.

It is an amenable number.

166579145 is a deficient number, since it is larger than the sum of its proper divisors (33315835).

166579145 is an equidigital number, since it uses as much as digits as its factorization.

166579145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33315834.

The product of its digits is 226800, while the sum is 44.

The square root of 166579145 is about 12906.5543426586. The cubic root of 166579145 is about 550.2248612236.

The spelling of 166579145 in words is "one hundred sixty-six million, five hundred seventy-nine thousand, one hundred forty-five".