81467866 has 8 divisors (see below), whose sum is σ = 122245344. Its totient is φ = 40719420.

The previous prime is 81467857. The next prime is 81467887. The reversal of 81467866 is 66876418.

It is a happy number.

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

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, 2251 + ... + 12961.

It is an arithmetic number, because the mean of its divisors is an integer number (15280668).

Almost surely, 2^81467866 is an apocalyptic number.

81467866 is a deficient number, since it is larger than the sum of its proper divisors (40777478).

81467866 is a wasteful number, since it uses less digits than its factorization.

81467866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14516.

The product of its digits is 387072, while the sum is 46.

The square root of 81467866 is about 9025.9551295140. The cubic root of 81467866 is about 433.5063334222.

The spelling of 81467866 in words is "eighty-one million, four hundred sixty-seven thousand, eight hundred sixty-six".