81166346 has 8 divisors (see below), whose sum is σ = 123566880. Its totient is φ = 39977388.

The previous prime is 81166307. The next prime is 81166357. The reversal of 81166346 is 64366118.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302726 + ... + 302993.

It is an arithmetic number, because the mean of its divisors is an integer number (15445860).

Almost surely, 2^81166346 is an apocalyptic number.

81166346 is a deficient number, since it is larger than the sum of its proper divisors (42400534).

81166346 is a wasteful number, since it uses less digits than its factorization.

81166346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605788.

The product of its digits is 20736, while the sum is 35.

The square root of 81166346 is about 9009.2367046271. The cubic root of 81166346 is about 432.9708567734.

The spelling of 81166346 in words is "eighty-one million, one hundred sixty-six thousand, three hundred forty-six".