81113366 has 16 divisors (see below), whose sum is σ = 124307568. Its totient is φ = 39686400.

The previous prime is 81113353. The next prime is 81113407. The reversal of 81113366 is 66331118.

It is a congruent number.

It is an unprimeable number.

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, 17006 + ... + 21246.

It is an arithmetic number, because the mean of its divisors is an integer number (7769223).

Almost surely, 2^81113366 is an apocalyptic number.

81113366 is a deficient number, since it is larger than the sum of its proper divisors (43194202).

81113366 is a wasteful number, since it uses less digits than its factorization.

81113366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4447.

The product of its digits is 2592, while the sum is 29.

The square root of 81113366 is about 9006.2959089739. The cubic root of 81113366 is about 432.8766313959.

The spelling of 81113366 in words is "eighty-one million, one hundred thirteen thousand, three hundred sixty-six".