8720766 has 12 divisors (see below), whose sum is σ = 18895032. Its totient is φ = 2906916.

The previous prime is 8720729. The next prime is 8720771. The reversal of 8720766 is 6670278.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8720766.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 242226 + ... + 242261.

It is an arithmetic number, because the mean of its divisors is an integer number (1574586).

Almost surely, 2^8720766 is an apocalyptic number.

8720766 is an abundant number, since it is smaller than the sum of its proper divisors (10174266).

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

8720766 is a wasteful number, since it uses less digits than its factorization.

8720766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484495 (or 484492 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 8720766 is about 2953.0943093643. The cubic root of 8720766 is about 205.8345200731.

The spelling of 8720766 in words is "eight million, seven hundred twenty thousand, seven hundred sixty-six".