80661799611 has 6 divisors (see below), whose sum is σ = 116511488340. Its totient is φ = 53774533068.

The previous prime is 80661799609. The next prime is 80661799633. The reversal of 80661799611 is 11699716608.

It is a happy number.

80661799611 is a `hidden beast` number, since 8 + 0 + 6 + 6 + 17 + 9 + 9 + 611 = 666.

It is not a de Polignac number, because 80661799611 - 2¹ = 80661799609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80661799601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4481211081 + ... + 4481211098.

It is an arithmetic number, because the mean of its divisors is an integer number (19418581390).

Almost surely, 2^80661799611 is an apocalyptic number.

80661799611 is a deficient number, since it is larger than the sum of its proper divisors (35849688729).

80661799611 is a wasteful number, since it uses less digits than its factorization.

80661799611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8962422185 (or 8962422182 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The spelling of 80661799611 in words is "eighty billion, six hundred sixty-one million, seven hundred ninety-nine thousand, six hundred eleven".