866843099142 has 32 divisors (see below), whose sum is σ = 1751041200384. Its totient is φ = 286055820000.

The previous prime is 866843099141. The next prime is 866843099183. The reversal of 866843099142 is 241990348668.

It is a super-2 number, since 2×866843099142² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866843099141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5897103 + ... + 6042309.

It is an arithmetic number, because the mean of its divisors is an integer number (54720037512).

Almost surely, 2^866843099142 is an apocalyptic number.

866843099142 is an abundant number, since it is smaller than the sum of its proper divisors (884198101242).

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

866843099142 is a wasteful number, since it uses less digits than its factorization.

866843099142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155164.

The product of its (nonzero) digits is 17915904, while the sum is 60.

The spelling of 866843099142 in words is "eight hundred sixty-six billion, eight hundred forty-three million, ninety-nine thousand, one hundred forty-two".