81706677683 has 8 divisors (see below), whose sum is σ = 86013440400. Its totient is φ = 77400556128.

The previous prime is 81706677671. The next prime is 81706677733. The reversal of 81706677683 is 38677660718.

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

It is a cyclic number.

It is not a de Polignac number, because 81706677683 - 2²⁰ = 81705629107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81706677583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113285 + ... + 419817.

It is an arithmetic number, because the mean of its divisors is an integer number (10751680050).

Almost surely, 2^81706677683 is an apocalyptic number.

81706677683 is a deficient number, since it is larger than the sum of its proper divisors (4306762717).

81706677683 is a wasteful number, since it uses less digits than its factorization.

81706677683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320581.

The product of its (nonzero) digits is 14224896, while the sum is 59.

The spelling of 81706677683 in words is "eighty-one billion, seven hundred six million, six hundred seventy-seven thousand, six hundred eighty-three".