811323830870666 has 16 divisors (see below), whose sum is σ = 1234129724313408. Its totient is φ = 399947286967200.

The previous prime is 811323830870629. The next prime is 811323830870689. The reversal of 811323830870666 is 666078038323118.

It is a junction number, because it is equal to n+sod(n) for n = 811323830870599 and 811323830870608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46366286 + ... + 61420518.

It is an arithmetic number, because the mean of its divisors is an integer number (77133107769588).

Almost surely, 2^{811323830870666} is an apocalyptic number.

811323830870666 is a deficient number, since it is larger than the sum of its proper divisors (422805893442742).

811323830870666 is a wasteful number, since it uses less digits than its factorization.

811323830870666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15433837.

The product of its (nonzero) digits is 41803776, while the sum is 62.

The spelling of 811323830870666 in words is "eight hundred eleven trillion, three hundred twenty-three billion, eight hundred thirty million, eight hundred seventy thousand, six hundred sixty-six".