81068669668 has 48 divisors (see below), whose sum is σ = 164315450880. Its totient is φ = 34277652864.

The previous prime is 81068669663. The next prime is 81068669677. The reversal of 81068669668 is 86696686018.

It is not an unprimeable number, because it can be changed into a prime (81068669663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3023730 + ... + 3050422.

It is an arithmetic number, because the mean of its divisors is an integer number (3423238560).

Almost surely, 2^81068669668 is an apocalyptic number.

It is an amenable number.

81068669668 is an abundant number, since it is smaller than the sum of its proper divisors (83246781212).

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

81068669668 is a wasteful number, since it uses less digits than its factorization.

81068669668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28156 (or 28154 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 64.

The spelling of 81068669668 in words is "eighty-one billion, sixty-eight million, six hundred sixty-nine thousand, six hundred sixty-eight".