80706771697 has 4 divisors (see below), whose sum is σ = 80710844580. Its totient is φ = 80702698816.

The previous prime is 80706771689. The next prime is 80706771701. The reversal of 80706771697 is 79617760708.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 558896881 + 80147874816 = 23641^2 + 283104^2 .

It is a cyclic number.

It is not a de Polignac number, because 80706771697 - 2³ = 80706771689 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80706771797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2006572 + ... + 2046397.

It is an arithmetic number, because the mean of its divisors is an integer number (20177711145).

Almost surely, 2^80706771697 is an apocalyptic number.

It is an amenable number.

80706771697 is a deficient number, since it is larger than the sum of its proper divisors (4072883).

80706771697 is a wasteful number, since it uses less digits than its factorization.

80706771697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4072882.

The product of its (nonzero) digits is 6223392, while the sum is 58.

The spelling of 80706771697 in words is "eighty billion, seven hundred six million, seven hundred seventy-one thousand, six hundred ninety-seven".