80661100841 has 4 divisors (see below), whose sum is σ = 80667892692. Its totient is φ = 80654308992.

The previous prime is 80661100831. The next prime is 80661100867. The reversal of 80661100841 is 14800116608.

It is a happy number.

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 76302460441 + 4358640400 = 276229^2 + 66020^2 .

It is a cyclic number.

It is not a de Polignac number, because 80661100841 - 2¹⁴ = 80661084457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80661100811) 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 3 ways as a sum of consecutive naturals, for example, 3378080 + ... + 3401873.

It is an arithmetic number, because the mean of its divisors is an integer number (20166973173).

Almost surely, 2^80661100841 is an apocalyptic number.

It is an amenable number.

80661100841 is a deficient number, since it is larger than the sum of its proper divisors (6791851).

80661100841 is a wasteful number, since it uses less digits than its factorization.

80661100841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6791850.

The product of its (nonzero) digits is 9216, while the sum is 35.

The spelling of 80661100841 in words is "eighty billion, six hundred sixty-one million, one hundred thousand, eight hundred forty-one".