866800086762018 has 16 divisors (see below), whose sum is σ = 1736914896615456. Its totient is φ = 288380908405440.

The previous prime is 866800086762011. The next prime is 866800086762047. The reversal of 866800086762018 is 810267680008668.

It is a self number, because there is not a number n which added to its sum of digits gives 866800086762018.

It is not an unprimeable number, because it can be changed into a prime (866800086762011) 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, 138113458743 + ... + 138113465018.

It is an arithmetic number, because the mean of its divisors is an integer number (108557181038466).

Almost surely, 2^{866800086762018} is an apocalyptic number.

866800086762018 is an abundant number, since it is smaller than the sum of its proper divisors (870114809853438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866800086762018 is a wasteful number, since it uses less digits than its factorization.

866800086762018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276226924289.

The product of its (nonzero) digits is 74317824, while the sum is 66.

The spelling of 866800086762018 in words is "eight hundred sixty-six trillion, eight hundred billion, eighty-six million, seven hundred sixty-two thousand, eighteen".