81833076668 has 48 divisors (see below), whose sum is σ = 166243875840. Its totient is φ = 34519801536.

The previous prime is 81833076649. The next prime is 81833076683. The reversal of 81833076668 is 86667033818.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2378573 + ... + 2412731.

It is an arithmetic number, because the mean of its divisors is an integer number (3463414080).

Almost surely, 2^81833076668 is an apocalyptic number.

It is an amenable number.

81833076668 is an abundant number, since it is smaller than the sum of its proper divisors (84410799172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81833076668 is a wasteful number, since it uses less digits than its factorization.

81833076668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35514 (or 35512 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 56.

The spelling of 81833076668 in words is "eighty-one billion, eight hundred thirty-three million, seventy-six thousand, six hundred sixty-eight".