81122366 has 12 divisors (see below), whose sum is σ = 131764392. Its totient is φ = 37440936.

The previous prime is 81122347. The next prime is 81122369. The reversal of 81122366 is 66322118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81122369) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119666 + ... + 120341.

It is an arithmetic number, because the mean of its divisors is an integer number (10980366).

Almost surely, 2^81122366 is an apocalyptic number.

81122366 is a deficient number, since it is larger than the sum of its proper divisors (50642026).

81122366 is a wasteful number, since it uses less digits than its factorization.

81122366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240035 (or 240022 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 81122366 is about 9006.7955455867. The cubic root of 81122366 is about 432.8926408642.

The spelling of 81122366 in words is "eighty-one million, one hundred twenty-two thousand, three hundred sixty-six".