81366862 has 16 divisors (see below), whose sum is σ = 129796992. Its totient is φ = 38122240.

The previous prime is 81366839. The next prime is 81366871. The reversal of 81366862 is 26866318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2787 + ... + 13057.

It is an arithmetic number, because the mean of its divisors is an integer number (8112312).

Almost surely, 2^81366862 is an apocalyptic number.

81366862 is a deficient number, since it is larger than the sum of its proper divisors (48430130).

81366862 is a wasteful number, since it uses less digits than its factorization.

81366862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10523.

The product of its digits is 82944, while the sum is 40.

The square root of 81366862 is about 9020.3581968789. The cubic root of 81366862 is about 433.3271053674.

It can be divided in two parts, 81366 and 862, that added together give a palindrome (82228).

The spelling of 81366862 in words is "eighty-one million, three hundred sixty-six thousand, eight hundred sixty-two".