166204706 has 4 divisors (see below), whose sum is σ = 249307062. Its totient is φ = 83102352.

The previous prime is 166204679. The next prime is 166204757. The reversal of 166204706 is 607402661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 607402661 = 89 ⋅6824749.

It can be written as a sum of positive squares in only one way, i.e., 90079081 + 76125625 = 9491^2 + 8725^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41551175 + ... + 41551178.

Almost surely, 2^166204706 is an apocalyptic number.

166204706 is a deficient number, since it is larger than the sum of its proper divisors (83102356).

166204706 is an equidigital number, since it uses as much as digits as its factorization.

166204706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83102355.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 166204706 is about 12892.0404125957. The cubic root of 166204706 is about 549.8122841489.

The spelling of 166204706 in words is "one hundred sixty-six million, two hundred four thousand, seven hundred six".