81466682 has 16 divisors (see below), whose sum is σ = 136410912. Its totient is φ = 36168720.

The previous prime is 81466681. The next prime is 81466691. The reversal of 81466682 is 28666418.

It is not an unprimeable number, because it can be changed into a prime (81466681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42113 + ... + 44004.

It is an arithmetic number, because the mean of its divisors is an integer number (8525682).

Almost surely, 2^81466682 is an apocalyptic number.

81466682 is a deficient number, since it is larger than the sum of its proper divisors (54944230).

81466682 is a wasteful number, since it uses less digits than its factorization.

81466682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86173.

The product of its digits is 110592, while the sum is 41.

The square root of 81466682 is about 9025.8895406492. The cubic root of 81466682 is about 433.5042333140.

The spelling of 81466682 in words is "eighty-one million, four hundred sixty-six thousand, six hundred eighty-two".