8666878700057 has 4 divisors (see below), whose sum is σ = 9176695094196. Its totient is φ = 8157062305920.

The previous prime is 8666878700021. The next prime is 8666878700063. The reversal of 8666878700057 is 7500078786668.

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 7755495347161 + 911383352896 = 2784869^2 + 954664^2 .

It is a cyclic number.

It is not a de Polignac number, because 8666878700057 - 2¹⁰ = 8666878699033 is a prime.

It is a super-2 number, since 2×8666878700057² (a number of 27 digits) contains 22 as substring.

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 8666878700057.

It is not an unprimeable number, because it can be changed into a prime (8666878700257) 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, 254908197044 + ... + 254908197077.

It is an arithmetic number, because the mean of its divisors is an integer number (2294173773549).

Almost surely, 2^{8666878700057} is an apocalyptic number.

It is an amenable number.

8666878700057 is a deficient number, since it is larger than the sum of its proper divisors (509816394139).

8666878700057 is a wasteful number, since it uses less digits than its factorization.

8666878700057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509816394138.

The product of its (nonzero) digits is 189665280, while the sum is 68.

The spelling of 8666878700057 in words is "eight trillion, six hundred sixty-six billion, eight hundred seventy-eight million, seven hundred thousand, fifty-seven".