866800082636858 has 8 divisors (see below), whose sum is σ = 1356730564127328. Its totient is φ = 414556561261084.

The previous prime is 866800082636857. The next prime is 866800082636861. The reversal of 866800082636858 is 858636280008668.

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

It is a super-2 number, since 2×866800082636858² (a number of 31 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (866800082636857) 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, 9421740028616 + ... + 9421740028707.

It is an arithmetic number, because the mean of its divisors is an integer number (169591320515916).

Almost surely, 2^{866800082636858} is an apocalyptic number.

866800082636858 is a deficient number, since it is larger than the sum of its proper divisors (489930481490470).

866800082636858 is a wasteful number, since it uses less digits than its factorization.

866800082636858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18843480057348.

The product of its (nonzero) digits is 1274019840, while the sum is 74.

The spelling of 866800082636858 in words is "eight hundred sixty-six trillion, eight hundred billion, eighty-two million, six hundred thirty-six thousand, eight hundred fifty-eight".