166066522 has 16 divisors (see below), whose sum is σ = 255811752. Its totient is φ = 80824320.

The previous prime is 166066501. The next prime is 166066529. The reversal of 166066522 is 225660661.

It can be written as a sum of positive squares in 4 ways, for example, as 57927321 + 108139201 = 7611^2 + 10399^2 .

It is not an unprimeable number, because it can be changed into a prime (166066529) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4818 + ... + 18850.

Almost surely, 2^166066522 is an apocalyptic number.

166066522 is a deficient number, since it is larger than the sum of its proper divisors (89745230).

166066522 is a wasteful number, since it uses less digits than its factorization.

166066522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14193.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 166066522 is about 12886.6800224107. The cubic root of 166066522 is about 549.6598690384.

The spelling of 166066522 in words is "one hundred sixty-six million, sixty-six thousand, five hundred twenty-two".