866788550274857 has 8 divisors (see below), whose sum is σ = 990672128371200. Its totient is φ = 742919132764224.

The previous prime is 866788550274799. The next prime is 866788550274863. The reversal of 866788550274857 is 758472055887668.

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 866788550274857 - 2¹⁶ = 866788550209321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866788550274877) 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, 3540015257 + ... + 3540260102.

It is an arithmetic number, because the mean of its divisors is an integer number (123834016046400).

Almost surely, 2^{866788550274857} is an apocalyptic number.

It is an amenable number.

866788550274857 is a deficient number, since it is larger than the sum of its proper divisors (123883578096343).

866788550274857 is a wasteful number, since it uses less digits than its factorization.

866788550274857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7080292855.

The product of its (nonzero) digits is 50577408000, while the sum is 86.

The spelling of 866788550274857 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred fifty million, two hundred seventy-four thousand, eight hundred fifty-seven".