166681292 has 6 divisors (see below), whose sum is σ = 291692268. Its totient is φ = 83340644.

The previous prime is 166681289. The next prime is 166681301. The reversal of 166681292 is 292186661.

It is a happy number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 20835158 + ... + 20835165.

It is an arithmetic number, because the mean of its divisors is an integer number (48615378).

Almost surely, 2^166681292 is an apocalyptic number.

It is an amenable number.

166681292 is a deficient number, since it is larger than the sum of its proper divisors (125010976).

166681292 is a wasteful number, since it uses less digits than its factorization.

166681292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41670327 (or 41670325 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The square root of 166681292 is about 12910.5109116564. The cubic root of 166681292 is about 550.3373049405.

The spelling of 166681292 in words is "one hundred sixty-six million, six hundred eighty-one thousand, two hundred ninety-two".