866133240485801 has 8 divisors (see below), whose sum is σ = 870928569256200. Its totient is φ = 861338022289920.

The previous prime is 866133240485771. The next prime is 866133240485813. The reversal of 866133240485801 is 108584042331668.

866133240485801 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 4 ways, for example, as 5098116925801 + 861035123560000 = 2257901^2 + 29343400^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866133240485801 is a prime.

It is a super-2 number, since 2×866133240485801² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866133240485831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11909486 + ... + 43290903.

It is an arithmetic number, because the mean of its divisors is an integer number (108866071157025).

Almost surely, 2^{866133240485801} is an apocalyptic number.

It is an amenable number.

866133240485801 is a deficient number, since it is larger than the sum of its proper divisors (4795328770399).

866133240485801 is a wasteful number, since it uses less digits than its factorization.

866133240485801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55287259.

The product of its (nonzero) digits is 26542080, while the sum is 59.

The spelling of 866133240485801 in words is "eight hundred sixty-six trillion, one hundred thirty-three billion, two hundred forty million, four hundred eighty-five thousand, eight hundred one".