866760720457873 has 8 divisors (see below), whose sum is σ = 871772894301888. Its totient is φ = 861748569559824.

The previous prime is 866760720457783. The next prime is 866760720457909. The reversal of 866760720457873 is 378754027067668.

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

It is a cyclic number.

It is not a de Polignac number, because 866760720457873 - 2²¹ = 866760718360721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 866760720457873.

It is not an unprimeable number, because it can be changed into a prime (866760723457873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73158036 + ... + 84176122.

It is an arithmetic number, because the mean of its divisors is an integer number (108971611787736).

Almost surely, 2^{866760720457873} is an apocalyptic number.

It is an amenable number.

866760720457873 is a deficient number, since it is larger than the sum of its proper divisors (5012173844015).

866760720457873 is a wasteful number, since it uses less digits than its factorization.

866760720457873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11472983.

The product of its (nonzero) digits is 3982970880, while the sum is 76.

The spelling of 866760720457873 in words is "eight hundred sixty-six trillion, seven hundred sixty billion, seven hundred twenty million, four hundred fifty-seven thousand, eight hundred seventy-three".