80661799612 has 24 divisors (see below), whose sum is σ = 141332604336. Its totient is φ = 40281091968.

The previous prime is 80661799609. The next prime is 80661799633. The reversal of 80661799612 is 21699716608.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16826688 + ... + 16831480.

It is an arithmetic number, because the mean of its divisors is an integer number (5888858514).

Almost surely, 2^80661799612 is an apocalyptic number.

It is an amenable number.

80661799612 is a deficient number, since it is larger than the sum of its proper divisors (60670804724).

80661799612 is a wasteful number, since it uses less digits than its factorization.

80661799612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9117 (or 9115 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 80661799612 in words is "eighty billion, six hundred sixty-one million, seven hundred ninety-nine thousand, six hundred twelve".