81066652 has 12 divisors (see below), whose sum is σ = 143122896. Its totient is φ = 40174400.

The previous prime is 81066637. The next prime is 81066691. The reversal of 81066652 is 25666018.

It is a congruent number.

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, 89224 + ... + 90127.

It is an arithmetic number, because the mean of its divisors is an integer number (11926908).

Almost surely, 2^81066652 is an apocalyptic number.

It is an amenable number.

81066652 is a deficient number, since it is larger than the sum of its proper divisors (62056244).

81066652 is a wasteful number, since it uses less digits than its factorization.

81066652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179468 (or 179466 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 81066652 is about 9003.7021274585. The cubic root of 81066652 is about 432.7935161088.

It can be divided in two parts, 81066 and 652, that added together give a palindrome (81718).

The spelling of 81066652 in words is "eighty-one million, sixty-six thousand, six hundred fifty-two".