66222755722266 has 32 divisors (see below), whose sum is σ = 155600321139648. Its totient is φ = 18523847754240.

The previous prime is 66222755722261. The next prime is 66222755722273.

66222755722266 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (66222755722261) 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, 38591348631 + ... + 38591350346.

It is an arithmetic number, because the mean of its divisors is an integer number (4862510035614).

Almost surely, 2^{66222755722266} is an apocalyptic number.

66222755722266 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66222755722266 is an abundant number, since it is smaller than the sum of its proper divisors (89377565417382).

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

66222755722266 is a wasteful number, since it uses less digits than its factorization.

66222755722266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77182699006.

The product of its digits is 101606400, while the sum is 60.

The spelling of 66222755722266 in words is "sixty-six trillion, two hundred twenty-two billion, seven hundred fifty-five million, seven hundred twenty-two thousand, two hundred sixty-six".