81366229176698 has 16 divisors (see below), whose sum is σ = 122690079737856. Its totient is φ = 40469541952560.

The previous prime is 81366229176679. The next prime is 81366229176719. The reversal of 81366229176698 is 89667192266318.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26223215 + ... + 29161437.

It is an arithmetic number, because the mean of its divisors is an integer number (7668129983616).

Almost surely, 2^{81366229176698} is an apocalyptic number.

81366229176698 is a deficient number, since it is larger than the sum of its proper divisors (41323850561158).

81366229176698 is a wasteful number, since it uses less digits than its factorization.

81366229176698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3010909.

The product of its digits is 564350976, while the sum is 74.

The spelling of 81366229176698 in words is "eighty-one trillion, three hundred sixty-six billion, two hundred twenty-nine million, one hundred seventy-six thousand, six hundred ninety-eight".