181792066 has 4 divisors (see below), whose sum is σ = 272688102. Its totient is φ = 90896032.

The previous prime is 181792049. The next prime is 181792103. The reversal of 181792066 is 660297181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 660297181 = 349 ⋅1891969.

It can be written as a sum of positive squares in only one way, i.e., 166023225 + 15768841 = 12885^2 + 3971^2 .

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 an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45448015 + ... + 45448018.

Almost surely, 2^181792066 is an apocalyptic number.

181792066 is a deficient number, since it is larger than the sum of its proper divisors (90896036).

181792066 is an equidigital number, since it uses as much as digits as its factorization.

181792066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90896035.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 181792066 is about 13483.0288140314. The cubic root of 181792066 is about 566.4892094083.

The spelling of 181792066 in words is "one hundred eighty-one million, seven hundred ninety-two thousand, sixty-six".