80866943784 has 256 divisors, whose sum is σ = 263443968000. Its totient is φ = 22720849920.

The previous prime is 80866943779. The next prime is 80866943789. The reversal of 80866943784 is 48734966808.

It is an interprime number because it is at equal distance from previous prime (80866943779) and next prime (80866943789).

It is not an unprimeable number, because it can be changed into a prime (80866943789) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2102712 + ... + 2140824.

It is an arithmetic number, because the mean of its divisors is an integer number (1029078000).

Almost surely, 2^80866943784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80866943784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131721984000).

80866943784 is an abundant number, since it is smaller than the sum of its proper divisors (182577024216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80866943784 is a wasteful number, since it uses less digits than its factorization.

80866943784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38205 (or 38195 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 63.

The spelling of 80866943784 in words is "eighty billion, eight hundred sixty-six million, nine hundred forty-three thousand, seven hundred eighty-four".