81067682 has 4 divisors (see below), whose sum is σ = 121601526. Its totient is φ = 40533840.

The previous prime is 81067681. The next prime is 81067691. The reversal of 81067682 is 28676018.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 68244121 + 12823561 = 8261^2 + 3581^2 .

It is not an unprimeable number, because it can be changed into a prime (81067681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20266919 + ... + 20266922.

Almost surely, 2^81067682 is an apocalyptic number.

81067682 is a deficient number, since it is larger than the sum of its proper divisors (40533844).

81067682 is a wasteful number, since it uses less digits than its factorization.

81067682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40533843.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 81067682 is about 9003.7593259705. The cubic root of 81067682 is about 432.7953490673.

The spelling of 81067682 in words is "eighty-one million, sixty-seven thousand, six hundred eighty-two".