666645552124122 has 32 divisors (see below), whose sum is σ = 1370001543049152. Its totient is φ = 216102703400064.

The previous prime is 666645552124121. The next prime is 666645552124133. The reversal of 666645552124122 is 221421255546666.

666645552124122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×666645552124122³ (a number of 45 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (666645552124121) 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, 740277163 + ... + 741177150.

It is an arithmetic number, because the mean of its divisors is an integer number (42812548220286).

Almost surely, 2^{666645552124122} is an apocalyptic number.

666645552124122 is an abundant number, since it is smaller than the sum of its proper divisors (703355990925030).

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

666645552124122 is a wasteful number, since it uses less digits than its factorization.

666645552124122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481456382.

The product of its digits is 41472000, while the sum is 57.

The spelling of 666645552124122 in words is "six hundred sixty-six trillion, six hundred forty-five billion, five hundred fifty-two million, one hundred twenty-four thousand, one hundred twenty-two".