166646146 has 4 divisors (see below), whose sum is σ = 249969222. Its totient is φ = 83323072.

The previous prime is 166646141. The next prime is 166646171. The reversal of 166646146 is 641646661.

166646146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 641646661 = 13313 ⋅48197.

It can be written as a sum of positive squares in only one way, i.e., 162690025 + 3956121 = 12755^2 + 1989^2 .

It is a junction number, because it is equal to n+sod(n) for n = 166646099 and 166646108.

It is not an unprimeable number, because it can be changed into a prime (166646141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41661535 + ... + 41661538.

Almost surely, 2^166646146 is an apocalyptic number.

166646146 is a deficient number, since it is larger than the sum of its proper divisors (83323076).

166646146 is an equidigital number, since it uses as much as digits as its factorization.

166646146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83323075.

The product of its digits is 124416, while the sum is 40.

The square root of 166646146 is about 12909.1497008905. The cubic root of 166646146 is about 550.2986213059.

The spelling of 166646146 in words is "one hundred sixty-six million, six hundred forty-six thousand, one hundred forty-six".