166457146 has 4 divisors (see below), whose sum is σ = 249685722. Its totient is φ = 83228572.

The previous prime is 166457111. The next prime is 166457177. The reversal of 166457146 is 641754661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 641754661 = 43 ⋅14924527.

It can be written as a sum of positive squares in only one way, i.e., 85655025 + 80802121 = 9255^2 + 8989^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 166457099 and 166457108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41614285 + ... + 41614288.

Almost surely, 2^166457146 is an apocalyptic number.

166457146 is a deficient number, since it is larger than the sum of its proper divisors (83228576).

166457146 is an equidigital number, since it uses as much as digits as its factorization.

166457146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83228575.

The product of its digits is 120960, while the sum is 40.

The square root of 166457146 is about 12901.8272349307. The cubic root of 166457146 is about 550.0905041147.

The spelling of 166457146 in words is "one hundred sixty-six million, four hundred fifty-seven thousand, one hundred forty-six".