81046667 has 8 divisors (see below), whose sum is σ = 92415456. Its totient is φ = 70411392.

The previous prime is 81046649. The next prime is 81046673. The reversal of 81046667 is 76664018.

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

It is a cyclic number.

It is not a de Polignac number, because 81046667 - 2¹² = 81042571 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81046667.

It is not an unprimeable number, because it can be changed into a prime (81046067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183143 + ... + 183584.

It is an arithmetic number, because the mean of its divisors is an integer number (11551932).

Almost surely, 2^81046667 is an apocalyptic number.

81046667 is a deficient number, since it is larger than the sum of its proper divisors (11368789).

81046667 is a wasteful number, since it uses less digits than its factorization.

81046667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366757.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 81046667 is about 9002.5922377946. The cubic root of 81046667 is about 432.7579483010.

The spelling of 81046667 in words is "eighty-one million, forty-six thousand, six hundred sixty-seven".