80257841866 has 16 divisors (see below), whose sum is σ = 121229073000. Its totient is φ = 39848303808.

The previous prime is 80257841861. The next prime is 80257841893. The reversal of 80257841866 is 66814875208.

It can be written as a sum of positive squares in 4 ways, for example, as 56420025841 + 23837816025 = 237529^2 + 154395^2 .

It is a super-3 number, since 3×80257841866³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (80257841861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1068976 + ... + 1141588.

Almost surely, 2^80257841866 is an apocalyptic number.

80257841866 is a deficient number, since it is larger than the sum of its proper divisors (40971231134).

80257841866 is a wasteful number, since it uses less digits than its factorization.

80257841866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76473.

The product of its (nonzero) digits is 5160960, while the sum is 55.

The spelling of 80257841866 in words is "eighty billion, two hundred fifty-seven million, eight hundred forty-one thousand, eight hundred sixty-six".