81068074 has 4 divisors (see below), whose sum is σ = 121602114. Its totient is φ = 40534036.

The previous prime is 81068063. The next prime is 81068089. The reversal of 81068074 is 47086018.

It is a happy number.

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., 59954049 + 21114025 = 7743^2 + 4595^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20267017 + ... + 20267020.

Almost surely, 2^81068074 is an apocalyptic number.

81068074 is a deficient number, since it is larger than the sum of its proper divisors (40534040).

81068074 is a wasteful number, since it uses less digits than its factorization.

81068074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40534039.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 81068074 is about 9003.7810946291. The cubic root of 81068074 is about 432.7960466552.

The spelling of 81068074 in words is "eighty-one million, sixty-eight thousand, seventy-four".