82013566691 has 24 divisors (see below), whose sum is σ = 96209839440. Its totient is φ = 69704107200.

The previous prime is 82013566643. The next prime is 82013566697. The reversal of 82013566691 is 19666531028.

It is a happy number.

It is not a de Polignac number, because 82013566691 - 2²² = 82009372387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82013566697) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 9168281 + ... + 9177221.

It is an arithmetic number, because the mean of its divisors is an integer number (4008743310).

Almost surely, 2^82013566691 is an apocalyptic number.

82013566691 is a deficient number, since it is larger than the sum of its proper divisors (14196272749).

82013566691 is a wasteful number, since it uses less digits than its factorization.

82013566691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10515 (or 10508 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 82013566691 in words is "eighty-two billion, thirteen million, five hundred sixty-six thousand, six hundred ninety-one".