81167682 has 8 divisors (see below), whose sum is σ = 162335376. Its totient is φ = 27055892.

The previous prime is 81167663. The next prime is 81167683. The reversal of 81167682 is 28676118.

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

81167682 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 81167682.

It is not an unprimeable number, because it can be changed into a prime (81167683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6763968 + ... + 6763979.

It is an arithmetic number, because the mean of its divisors is an integer number (20291922).

Almost surely, 2^81167682 is an apocalyptic number.

81167682 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81167682 is a wasteful number, since it uses less digits than its factorization.

81167682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13527952.

The product of its digits is 32256, while the sum is 39.

The square root of 81167682 is about 9009.3108504480. The cubic root of 81167682 is about 432.9732323306.

The spelling of 81167682 in words is "eighty-one million, one hundred sixty-seven thousand, six hundred eighty-two".