10001765866 has 8 divisors (see below), whose sum is σ = 15056810820. Its totient is φ = 4982828928.

The previous prime is 10001765861. The next prime is 10001765911. The reversal of 10001765866 is 66856710001.

10001765866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7305975625 + 2695790241 = 85475^2 + 51921^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (10001765861) 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 3 ways as a sum of consecutive naturals, for example, 9026311 + ... + 9027418.

Almost surely, 2^10001765866 is an apocalyptic number.

10001765866 is a deficient number, since it is larger than the sum of its proper divisors (5055044954).

10001765866 is a wasteful number, since it uses less digits than its factorization.

10001765866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18054008.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 10001765866 in words is "ten billion, one million, seven hundred sixty-five thousand, eight hundred sixty-six".