81466250731006 has 8 divisors (see below), whose sum is σ = 122977716072120. Its totient is φ = 40473678706968.

The previous prime is 81466250730947. The next prime is 81466250731009. The reversal of 81466250731006 is 60013705266418.

81466250731006 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81466250731009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129723328876 + ... + 129723329503.

It is an arithmetic number, because the mean of its divisors is an integer number (15372214509015).

Almost surely, 2^{81466250731006} is an apocalyptic number.

81466250731006 is a deficient number, since it is larger than the sum of its proper divisors (41511465341114).

81466250731006 is a wasteful number, since it uses less digits than its factorization.

81466250731006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259446658538.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 81466250731006 in words is "eighty-one trillion, four hundred sixty-six billion, two hundred fifty million, seven hundred thirty-one thousand, six".