66718213122 has 16 divisors (see below), whose sum is σ = 145567010592. Its totient is φ = 20217640320.

The previous prime is 66718213099. The next prime is 66718213169. The reversal of 66718213122 is 22131281766.

It is a super-2 number, since 2×66718213122² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505440943 + ... + 505441074.

It is an arithmetic number, because the mean of its divisors is an integer number (9097938162).

Almost surely, 2^66718213122 is an apocalyptic number.

66718213122 is an abundant number, since it is smaller than the sum of its proper divisors (78848797470).

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

66718213122 is a wasteful number, since it uses less digits than its factorization.

66718213122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010882033.

The product of its digits is 48384, while the sum is 39.

Adding to 66718213122 its reverse (22131281766), we get a palindrome (88849494888).

The spelling of 66718213122 in words is "sixty-six billion, seven hundred eighteen million, two hundred thirteen thousand, one hundred twenty-two".