8001976866 has 64 divisors (see below), whose sum is σ = 17855824896. Its totient is φ = 2374041600.

The previous prime is 8001976849. The next prime is 8001976903. The reversal of 8001976866 is 6686791008.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 673570 + ... + 685346.

It is an arithmetic number, because the mean of its divisors is an integer number (278997264).

Almost surely, 2^8001976866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8001976866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8927912448).

8001976866 is an abundant number, since it is smaller than the sum of its proper divisors (9853848030).

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

8001976866 is a wasteful number, since it uses less digits than its factorization.

8001976866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12107.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 8001976866 is about 89453.7694342726. The cubic root of 8001976866 is about 2000.1647252658.

The spelling of 8001976866 in words is "eight billion, one million, nine hundred seventy-six thousand, eight hundred sixty-six".