80866791 has 12 divisors (see below), whose sum is σ = 116894232. Its totient is φ = 53871216.

The previous prime is 80866787. The next prime is 80866811. The reversal of 80866791 is 19766808.

It is a happy number.

It is not a de Polignac number, because 80866791 - 2² = 80866787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80861791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14500 + ... + 19286.

It is an arithmetic number, because the mean of its divisors is an integer number (9741186).

Almost surely, 2^80866791 is an apocalyptic number.

80866791 is a deficient number, since it is larger than the sum of its proper divisors (36027441).

80866791 is a wasteful number, since it uses less digits than its factorization.

80866791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6670 (or 6667 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 80866791 is about 8992.5964548622. The cubic root of 80866791 is about 432.4375549971.

The spelling of 80866791 in words is "eighty million, eight hundred sixty-six thousand, seven hundred ninety-one".