81766324 has 12 divisors (see below), whose sum is σ = 143155264. Its totient is φ = 40864824.

The previous prime is 81766319. The next prime is 81766327. The reversal of 81766324 is 42366718.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81766327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12619 + ... + 17965.

Almost surely, 2^81766324 is an apocalyptic number.

It is an amenable number.

81766324 is a deficient number, since it is larger than the sum of its proper divisors (61388940).

81766324 is a wasteful number, since it uses less digits than its factorization.

81766324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9174 (or 9172 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 81766324 is about 9042.4733342156. The cubic root of 81766324 is about 434.0350725902.

The spelling of 81766324 in words is "eighty-one million, seven hundred sixty-six thousand, three hundred twenty-four".