7716280866 has 128 divisors (see below), whose sum is σ = 18517524480. Its totient is φ = 2097446400.

The previous prime is 7716280861. The next prime is 7716280889. The reversal of 7716280866 is 6680826177.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (7716280861) 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 63 ways as a sum of consecutive naturals, for example, 32285575 + ... + 32285813.

It is an arithmetic number, because the mean of its divisors is an integer number (144668160).

Almost surely, 2^7716280866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7716280866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9258762240).

7716280866 is an abundant number, since it is smaller than the sum of its proper divisors (10801243614).

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

7716280866 is a wasteful number, since it uses less digits than its factorization.

7716280866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600.

The product of its (nonzero) digits is 1354752, while the sum is 51.

The square root of 7716280866 is about 87842.3637318578. The cubic root of 7716280866 is about 1976.0715963024.

The spelling of 7716280866 in words is "seven billion, seven hundred sixteen million, two hundred eighty thousand, eight hundred sixty-six".