866153045421313 has 4 divisors (see below), whose sum is σ = 932780202761428. Its totient is φ = 799525888081200.

The previous prime is 866153045421247. The next prime is 866153045421353. The reversal of 866153045421313 is 313124540351668.

866153045421313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 429128501483889 + 437024543937424 = 20715417^2 + 20905132^2 .

It is a cyclic number.

It is not a de Polignac number, because 866153045421313 - 2¹⁷ = 866153045290241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866153045421353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33313578670038 + ... + 33313578670063.

It is an arithmetic number, because the mean of its divisors is an integer number (233195050690357).

Almost surely, 2^{866153045421313} is an apocalyptic number.

It is an amenable number.

866153045421313 is a deficient number, since it is larger than the sum of its proper divisors (66627157340115).

866153045421313 is a wasteful number, since it uses less digits than its factorization.

866153045421313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66627157340114.

The product of its (nonzero) digits is 6220800, while the sum is 52.

The spelling of 866153045421313 in words is "eight hundred sixty-six trillion, one hundred fifty-three billion, forty-five million, four hundred twenty-one thousand, three hundred thirteen".