78843221466 has 32 divisors (see below), whose sum is σ = 158068437120. Its totient is φ = 26217457344.

The previous prime is 78843221461. The next prime is 78843221489. The reversal of 78843221466 is 66412234887.

It is a super-2 number, since 2×78843221466² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78843221461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8861316 + ... + 8870208.

It is an arithmetic number, because the mean of its divisors is an integer number (4939638660).

Almost surely, 2^78843221466 is an apocalyptic number.

78843221466 is an abundant number, since it is smaller than the sum of its proper divisors (79225215654).

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

78843221466 is a wasteful number, since it uses less digits than its factorization.

78843221466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12310.

The product of its digits is 3096576, while the sum is 51.

The spelling of 78843221466 in words is "seventy-eight billion, eight hundred forty-three million, two hundred twenty-one thousand, four hundred sixty-six".