81066347332 has 12 divisors (see below), whose sum is σ = 142649899756. Its totient is φ = 40309233120.

The previous prime is 81066347317. The next prime is 81066347387. The reversal of 81066347332 is 23374366018.

It can be written as a sum of positive squares in 2 ways, for example, as 20680165636 + 60386181696 = 143806^2 + 245736^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

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, 55984323 + ... + 55985770.

Almost surely, 2^81066347332 is an apocalyptic number.

It is an amenable number.

81066347332 is a deficient number, since it is larger than the sum of its proper divisors (61583552424).

81066347332 is a wasteful number, since it uses less digits than its factorization.

81066347332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111970278 (or 111970276 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 43.

The spelling of 81066347332 in words is "eighty-one billion, sixty-six million, three hundred forty-seven thousand, three hundred thirty-two".