81046166 has 8 divisors (see below), whose sum is σ = 122385600. Its totient is φ = 40250968.

The previous prime is 81046151. The next prime is 81046177. The reversal of 81046166 is 66164018.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135686 + ... + 136281.

It is an arithmetic number, because the mean of its divisors is an integer number (15298200).

Almost surely, 2^81046166 is an apocalyptic number.

81046166 is a deficient number, since it is larger than the sum of its proper divisors (41339434).

81046166 is a wasteful number, since it uses less digits than its factorization.

81046166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272118.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 81046166 is about 9002.5644124327. The cubic root of 81046166 is about 432.7570565836.

The spelling of 81046166 in words is "eighty-one million, forty-six thousand, one hundred sixty-six".