81066232 has 32 divisors (see below), whose sum is σ = 164556000. Its totient is φ = 37217664.

The previous prime is 81066221. The next prime is 81066233. The reversal of 81066232 is 23266018.

It is a self number, because there is not a number n which added to its sum of digits gives 81066232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81066233) 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, 18738 + ... + 22654.

It is an arithmetic number, because the mean of its divisors is an integer number (5142375).

Almost surely, 2^81066232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81066232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82278000).

81066232 is an abundant number, since it is smaller than the sum of its proper divisors (83489768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81066232 is a wasteful number, since it uses less digits than its factorization.

81066232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4135 (or 4131 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 81066232 is about 9003.6788036891. The cubic root of 81066232 is about 432.7927686844.

The spelling of 81066232 in words is "eighty-one million, sixty-six thousand, two hundred thirty-two".