660221303122066 has 32 divisors (see below), whose sum is σ = 1135340312573952. Its totient is φ = 282069505230480.

The previous prime is 660221303122027. The next prime is 660221303122079.

660221303122066 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×660221303122066² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12380496 + ... + 38389051.

It is an arithmetic number, because the mean of its divisors is an integer number (35479384767936).

Almost surely, 2^{660221303122066} is an apocalyptic number.

660221303122066 is a deficient number, since it is larger than the sum of its proper divisors (475119009451886).

660221303122066 is a wasteful number, since it uses less digits than its factorization.

660221303122066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50772454.

The product of its (nonzero) digits is 186624, while the sum is 40.

It can be divided in two parts, 66022130 and 3122066, that added together give a palindrome (69144196).

The spelling of 660221303122066 in words is "six hundred sixty trillion, two hundred twenty-one billion, three hundred three million, one hundred twenty-two thousand, sixty-six".