81034666 has 8 divisors (see below), whose sum is σ = 121785984. Its totient is φ = 40439340.

The previous prime is 81034621. The next prime is 81034697. The reversal of 81034666 is 66643018.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 37690 + ... + 39781.

It is an arithmetic number, because the mean of its divisors is an integer number (15223248).

Almost surely, 2^81034666 is an apocalyptic number.

81034666 is a deficient number, since it is larger than the sum of its proper divisors (40751318).

81034666 is a wasteful number, since it uses less digits than its factorization.

81034666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77996.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 81034666 is about 9001.9256828747. The cubic root of 81034666 is about 432.7365870093.

It can be divided in two parts, 8103 and 4666, that added together give a square (12769 = 113²).

The spelling of 81034666 in words is "eighty-one million, thirty-four thousand, six hundred sixty-six".